CN110044743A - Nickel-based monocrystal small sample fatigue test system and method - Google Patents
Nickel-based monocrystal small sample fatigue test system and method Download PDFInfo
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- CN110044743A CN110044743A CN201910292723.6A CN201910292723A CN110044743A CN 110044743 A CN110044743 A CN 110044743A CN 201910292723 A CN201910292723 A CN 201910292723A CN 110044743 A CN110044743 A CN 110044743A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0298—Manufacturing or preparing specimens
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
Abstract
Present disclose provides a kind of nickel-based monocrystal small sample fatigue test system and methods, belong to mechanical engineering technical field.The sample for being used for fatigue test includes test section and thread segment, and screw thread segment number is two and is connected to the both ends of the test section.The sample is when carrying out fatigue test, it can be threadedly connected on clamp assembly by thread segment, so that the connection of sample and clamp assembly is more compact and stablizes, it overcomes in the prior art between sample and fixture using defect loosely organized caused by pin connection, so that the sample can be not only used for drawing pulling fatigue experimental, it can be used for repeated tension and compression test or pressure pressure fatigue test, improve the application range of sample and the flexibility of application.
Description
Technical field
This disclosure relates to mechanical engineering technical field more particularly to a kind of nickel-based monocrystal small sample fatigue test system and side
Method.
Background technique
Nickel-base high-temperature single crystal alloy has become manufacture gas-turbine unit hot-end component because of its good hot properties
Important materials, it is especially more in aerospace field application.Aircraft starts it due to its working characteristics, frequent landing
The anti-fatigue performance of machine blade has high requirement, and constituent material of the nickel-base high-temperature single crystal alloy as engine blade is tired
Labor performance directly determines the superiority and inferiority of engine performance, therefore the fatigue behaviour of research and probe monocrystal material is of great significance.
Standard sample can be processed by monocrystal material, so in the prior art to study the fatigue behaviour of single crystal alloy
Mechanics Performance Testing is carried out on fatigue tester afterwards.Sample used is generally biggish plate sample, and source is mostly to purchase
The coupon for buying monocrystal material, obtains sample by line cutting technology on coupon.It is provided with pin hole in sample upper and lower side, passes through two
The load subsystem of pin joint test machine carries out fatigue experiment.
In prior art, specimen size is larger, due to expensive, the material required for testing every time of monocrystal material
Expect higher cost, spends more.Due to the design feature of standard sample, connected between standard sample and testing machine by pin hole,
Integral connection structure more loosens, when carrying out drawing pulling fatigue experimental can normal assays, but if carry out repeated tension and compression test,
The limitation of specimen clamping mode causes test not can be carried out, this causes the purposes of sample more single.Moreover, existing examination
The structure for testing machine is mostly designed according to standard sample, and pull rod and fixture etc. are all only applicable to dressing plate sample, for
The sample of other forms, testing machine not can be carried out fatigue test.
Moreover, in prior art, sample source does not have representativeness.Existing standard sample mostly passes through purchase
Monocrystalline coupon material, by the processing technologies such as wire cutting form, relative to the forming turbine vane of aero-engine, coupon material
Material molding is simple, handles without the complicated technology of blade, larger difference can be also shown in performance, therefore coupon material adds
The sample that work obtains can not really reflect the fatigue behaviour of turbo blade.
Above- mentioned information disclosed in the background technology part are only used for reinforcing the understanding to the background of the disclosure, therefore it can
To include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
The disclosure is designed to provide a kind of nickel-based monocrystal small sample fatigue test system and method, improves answering for sample
Use range.
For achieving the above object, the disclosure adopts the following technical scheme that
According to the first aspect of the disclosure, a kind of sample for fatigue test is provided, comprising:
Test section；
Thread segment, quantity are two and are connected to the both ends of the test section.
In a kind of exemplary embodiment of the disclosure, the sample further include:
Linkage section, quantity are two；Any linkage section connects the test section and the thread segment.
In a kind of exemplary embodiment of the disclosure, the test section is cylinder；
The thread segment and the test section are coaxially disposed, and the diameter of the thread segment is greater than the straight of the test section
Diameter；
The linkage section and the test section are coaxially disposed, and the bus of the test section is camber line；The linkage section with
The diameter of one end of the test section connection is identical as the diameter of the test section；The linkage section is connect with the thread segment
The diameter of one end is identical as the diameter of the thread segment.
In a kind of exemplary embodiment of the disclosure, the sample is from numbers of hot-side engine component processing.
According to the second aspect of the disclosure, provide a kind of clamp assembly for fatigue test, for above-mentioned examination
Sample cooperation；The clamp assembly includes:
First connecting rod has the first connecting end surface being oppositely arranged and second connection end face, the first connecting rod
First connecting end surface is provided with binding groove, and the second connection end face of the first connecting rod is used to stretch with a fatigue experimental device
The connection of contracting component；
Collet, is provided with the installation threaded hole and fastening through-hole of coaxial line and connection, and the installation threaded hole is used for and institute
State the thread segment cooperation of sample；It is inserted into the binding groove to one end fits of the collet far from the installation threaded hole；
Pad post can be arranged in the installation threaded hole and the fastening through-hole, and one end of the pad post is used for and institute
Thread segment connection is stated, the other end is connect with the slot bottom of the binding groove；
Connector connects the first connecting rod and the collet.
In a kind of exemplary embodiment of the disclosure, limit protrusion, the limit protrusion are provided on the collet
Portion has the first side being oppositely arranged and second side；First side of the limit protrusion and the first of the first connecting rod connect
Contact surface cooperation；
The connector is threadedly coupled with the first connecting rod, and the connector is provided with limit blocking portion, described
The second side for limiting blocking portion and the limit protrusion cooperates.
In a kind of exemplary embodiment of the disclosure, the clamp assembly further include:
Second connecting rod has the first connecting pin and second connection end, the first connecting pin of second connecting rod and institute
The second connection end face for stating first connecting rod is threadedly coupled, and the second connection end of second connecting rod is used to try with the fatigue
The telescopic component of experiment device connects.
In a kind of exemplary embodiment of the disclosure, the clamp assembly further includes being arranged in second connecting rod
First for tight part and second for tight part；Described first for tight part includes cooperating with the second connection end face of the first connecting rod
First surface, described second for the second surface that tight part includes with the cooperation of the telescopic component of the fatigue experimental device, and works as institute
When stating first the rotation of first direction occur for tight part relative to described second for tight part, the first surface and second table
The distance between face increases.
In terms of according to the third of the disclosure, a kind of nickel-based monocrystal small sample fatigue test system is provided, including above-mentioned
Nickel-base high-temperature single crystal alloy sample, and including above-mentioned clamp assembly.
According to the 4th of the disclosure the aspect, a kind of nickel-based monocrystal small sample fatigue test method is provided, is applied to above-mentioned
Nickel-based monocrystal small sample fatigue test system；Nickel-based monocrystal small sample fatigue test method includes:
The nickel-base high-temperature single crystal alloy sample is connected to the clamp assembly；
The clamp assembly is connected to the telescopic component of the fatigue experimental device；
The telescopic component loads tensile load or compressive load to the sample.
The nickel-based monocrystal small sample fatigue test system and method that the disclosure provides, can both carry out drawing pulling fatigue experimental,
It can be used for repeated tension and compression test or pressure pressure fatigue test, improve the application range of sample and the flexibility of application.
Detailed description of the invention
Its example embodiment is described in detail by referring to accompanying drawing, the above and other feature and advantage of the disclosure will become
It is more obvious.
Fig. 1 is the schematic cross-sectional view of the sample of disclosure embodiment.
Fig. 2 is the schematic perspective view of the sample of disclosure embodiment.
Fig. 3 is the configuration schematic diagram of the clamp assembly of disclosure embodiment.
Fig. 4 is the structural schematic diagram of the clamp assembly of disclosure embodiment.
Fig. 5 is the structural schematic diagram of the collet of disclosure embodiment.
Fig. 6 is the structural schematic diagram of the first connecting rod of disclosure embodiment.
Fig. 7 is the structural schematic diagram of the second connecting rod of disclosure embodiment.
Fig. 8 is structural schematic diagram of the second of disclosure embodiment for tight part.
Fig. 9 is the structural schematic diagram of the telescopic component of disclosure embodiment.
Figure 10 is the structural schematic diagram of the pull rod of disclosure embodiment.
Figure 11 is that the integrated structure of the standby tight part and first connecting rod, the second connecting rod when carrying out standby tight operation is illustrated
Figure.
Figure 12 is the structural schematic diagram of the fatigue experimental device of disclosure embodiment.
Figure 13 is the structural schematic diagram of the high temperature furnace of disclosure embodiment.
The reference numerals are as follows for main element in figure:
1, sample；11, test section；12, thread segment；13, linkage section；2, first connecting rod；21, first body of rod；22, second
The body of rod；23, the first connecting end surface；24, second connection end face；25, binding groove；3, collet；31, the first Gripper body；32, second
Gripper body；33, protrusion is limited；34, threaded hole is installed；4, pad post；5, connector；51, nut；52, blocking portion is limited；6,
Second connecting rod；61, the first connecting pin；62, second connection end；71, first for tight part；72, second for tight part；721, the second ring
Shape ontology；722, second surface；723, the 4th surface；81, telescopic component；811, board；812, pull rod；8121, cross bar；
8122, adjusting rod；91, extensometer；92, high temperature furnace.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be real in a variety of forms
It applies, and is not understood as limited to example set forth herein；On the contrary, these embodiments are provided so that the disclosure will more comprehensively and
Completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Described feature, structure or characteristic
It can be incorporated in any suitable manner in one or more embodiments.In the following description, many details are provided
Embodiment of the disclosure is fully understood to provide.
When certain structure is at other structures "upper", it is possible to refer to that certain structural integrity is formed in other structures, or refer to certain
Structure is " direct " to be arranged in other structures, or refers to that certain structure is arranged in other structures by the way that another structure is " indirect ".Term
"one", " one ", " described " to indicate there are one or more elements/component part/etc.；Term " comprising " and " having " is used
To indicate the open meaning being included and refer to that the element/component part/in addition to listing also may be present separately other than waiting
Outer element/component part/etc..Term " first " and " second " etc. are only used as label, are not the quantity limits to its object
System.
The disclosure provides a kind of nickel-base high-temperature single crystal alloy sample for fatigue test, for fatigue experimental device
Clamp assembly connection, to carry out fatigue test.It as depicted in figs. 1 and 2, include: 11 He of test section for the sample of fatigue test 1
Thread segment 12, the quantity of thread segment 12 are two and are connected to the both ends of test section 11.
The sample 1 that the disclosure provides can be threadedly connected to fatigue test by thread segment 12 when carrying out fatigue test
On the clamp assembly of device, so that the connection of sample 1 and clamp assembly is more compact and stablizes, sample in the prior art is overcome
Using defect loosely organized caused by pin connection between 1 and fixture, so that the sample 1 can be not only used for drawing fatigue examination
Test, can be used for repeated tension and compression test or pressure pressure fatigue test, improve sample 1 application range and application it is flexible
Property.
In the following, being further expalined and illustrating in conjunction with all parts structure and function of the attached drawing to the sample 1 of the disclosure.
In one embodiment, as depicted in figs. 1 and 2, sample 1 can also include linkage section 13, the quantity of linkage section 13
It is two；Any 13 joint test section 11 of linkage section and thread segment 12.In this way, between test section 11 and any thread segment 12
It is provided with linkage section 13.Linkage section 13 can make the active force on fatigue experimental device more be uniformly applied to test section
11, the concentration of the damage or stress that reduce thread segment 12 is loaded directly into the degree of test section 11, plays the work of connection and buffering
With.
In one embodiment, as depicted in figs. 1 and 2, test section 11 can be cylinder, so as to pass through Vehicle Processing
Etc. simple processes and convenient preparation.Of course, in another embodiment, test section 11 or cuboid, hexagonal prisms
Etc. other shapes.
External screw thread has can be set in thread segment 12, to connect for the clamp assembly with fatigue experimental device.Such as Fig. 1 and figure
Shown in 2, thread segment 12 can be coaxially disposed with test section 11, so that the power guaranteed on fatigue experimental device can more equably
Load on test section 11, and can guarantee test section 11 when carrying out fatigue test to moderate.It is understood that with the examination
Internal screw thread has can be set in the clamp assembly for the fatigue experimental device that sample 1 matches, and is threadedly coupled to realize.
In one embodiment, as shown in Figure 1, thread segment 12 can be greater than test section 11 for cylindrical and diameter.Connection
Section 13 can be coaxially disposed with test section 11, and the bus of test section 11 is camber line；Linkage section 13 connect with test section 11 one
The diameter at end is identical as the diameter of test section 11；The diameter of one end that linkage section 13 is connect with thread segment 12 is straight with thread segment 12
Diameter is identical.In this way, together with linkage section 13 can connect smoothly thread segment 12 with test section 11, it can be to avoid thread segment 12
The stress generated when being directly connected to test section 11 is concentrated, the uniform force of guarantee test section 11.
In one embodiment, thread segment 12, test section 11 and linkage section 13 are an integral structure.The material of sample 1 can
With identical as material to be assessed.For example, the material of sample 1 can be nickel-base high-temperature single crystal alloy, Ni-based to assess
The anti-fatigue ability of single crystal super alloy.
In order to as make the material of sample 1 consistent with the material on component to be assessed as possible, so that the fatigue test of sample 1
As a result it can more precisely reflect the anti-fatigue performance of component to be assessed, it in one embodiment, can be directly from having made
Sample 1 is processed on the standby component to be assessed completed.For example, can from engine thermal end pieces directly by cutting,
The techniques such as Vehicle Processing obtain sample 1, and the material to guarantee sample 1 is consistent with the material of engine thermal end pieces, and then passes through examination
The anti-fatigue performance of 1 accurate evaluation engine thermal end pieces of sample overcomes 1 preparation process of sample and engine thermal end pieces to prepare work
Test result deviation caused by skill is inconsistent.Engine thermal end pieces can include but is not limited to engine blade and start wheel
Disk etc..
The sample 1 with smaller size smaller can be prepared, to reduce the preparation cost of sample 1, especially material cost.No
Only in this way, when the volume of sample 1 is smaller, more samples 1 can be prepared from same component to be assessed, are able to ascend
Treat the assessment efficiency of evaluation means.
In one embodiment, in the axial direction, the length of sample 1 can be not more than 36mm, and sample 1 is in any position
Diameter can be not more than 6mm, to limit requirement of the sample 1 to scantling, so that the quantity of material that sample 1 consumes is less, and make
More sample 1 can be prepared by obtaining component to be assessed.
In the following, as an example, providing the specific size and structure of a kind of sample 1 of the disclosure.In this embodiment, such as
Shown in Fig. 1 and Fig. 2, which includes cylindrical test section 11, and any end of test section 11 is sequentially connected connection outward
Section 13 and thread segment 12.Wherein, it test section 11, linkage section 13 and the equal coaxial line of thread segment 12 and is an integral structure, and material
It is identical.The cylindrical body that test section 11 is diameter 2.6mm and length is 7.2mm, thread segment 12 is diameter 6mm, length is 9mm and sets
It is equipped with externally threaded cylindrical body；The side of linkage section 13 is curved surface, and the bus of curved surface is the camber line of radius 9.5mm, and linkage section
13 end diameter is identical as test section 11, and the outside diameter of linkage section 13 is identical as thread segment 12.The sample 1 can be by cutting
It cuts, the techniques such as Vehicle Processing are directly obtained from engine blade or turbine engine disk.
The disclosure also provides a kind of clamp assembly for fatigue test, for real with the above-mentioned sample for fatigue test
Apply the cooperation of sample 1 described in mode；As shown in Fig. 3~Fig. 6, clamp assembly includes first connecting rod 2, collet 3, pad post 4
With connector 5；Wherein,
First connecting rod 2 has the first connecting end surface 23 and second connection end face 24, the first connecting pin of first connecting rod 2
Face 23 is provided with binding groove 25, and the second connection end face 24 of first connecting rod 2 is for the telescopic component with a fatigue experimental device
81 connections；
Collet 3 is provided with the installation threaded hole 34 and fastening through-hole of coaxial line and connection, and installation threaded hole 34 is used for and examination
The thread segment 12 of sample 1 cooperates；It is inserted into binding groove 25 to one end fits of the collet 3 far from installation threaded hole 34；
Pad post 4 can be arranged in installation threaded hole 34 and fastening through-hole, and one end of pad post 4 is used to connect with thread segment 12
It connects, the other end is connect with the slot bottom of binding groove 25；
Connector 5 connects first connecting rod 2 and collet 3.
The pad post 4 can guarantee that sample 1 is in stationary state while guarantee sample 1 is to moderate, will not be because of tired
Labor load loosens.The clamp assembly of the disclosure with sample 1 when matching, the installation of the thread segment 12 and collet 3 of sample 1
Threaded hole 34 is threadedly coupled；In this way, fatigue experimental device can provide drawing force to sample 1 by clamp assembly, so that sample 1
It can carry out drawing pulling fatigue experimental.Fatigue experimental device can also provide pressure to sample 1 by clamp assembly, at this time pad post 4
Can by first connecting rod 2 pressure (be directed toward sample 1, for so that sample 1 be in compressive deformation power) be directly conducted to
The thread segment 12 of sample 1 avoids the screw thread conducting pressure completely by thread segment 12, avoids the shape of the screw thread of thread segment 12
Become caused by error, and ensure that sample 1 to moderate；Therefore, sample 1 can also carry out repeated tension and compression test and pressure pressure fatigue
Test.Therefore, the clamp assembly with sample 1 of the disclosure is compact-sized after cooperating, and will not loosen because of fatigue load, can be with
Drawingand pressing fatigue can also be carried out so that the sample 1 can both carry out drawing pulling fatigue experimental by effectively conducting drawing force or compressing force
Test can also carry out pressure pressure fatigue test.
In the following, being further expalined and saying in conjunction with all parts structure and function of the attached drawing to the clamp assembly of the disclosure
It is bright.
In one embodiment, as shown in figure 5, limit protrusion 33 can be set on collet 3, limit protrusion 33 has
There are the first side being oppositely arranged and second side；Limit the first side of protrusion 33 and the first connecting end surface 23 of first connecting rod 2
Cooperation；Connector 5 is threadedly coupled with first connecting rod 2, and limited steric hindrance stopper 52 can be set in connector 5, limits blocking portion
52 cooperate with the second side for limiting protrusion 33.In this way, the limit protrusion 33 of collet 3 is fixed in the of first connecting rod 2
Between one connecting end surface 23 and the limit blocking portion 52 of connector 5, so that closely being connected between collet 3 and first connecting rod 2, mention
The high structural compactness of clamp assembly.
Optionally, as shown in figure 5, limit protrusion 33 can be an annular protrusion.
Optionally, installation threaded hole 34 is identical with the internal diameter of fastening through-hole.
In one embodiment, the material of collet 3 can be K403 alloy, to reduce the preparation cost of collet 3, and guarantee
Collet 3 is resistant to high temperature while having preferable mechanical property, so that collet 3 may be reused.
In one embodiment, as shown in figure 3, connector 5 may include a nut 51 and the limit for being connected to nut 51
Blocking portion 52.The interior diameter of nut 51 is greater than the diameter of limit protrusion 33, and limit protrusion 33 is allowed to be placed in nut
In 51.Nut 51 has internal screw thread；One end (one end of the first connecting end surface 23 of the setting) tool of first connecting rod 2 close to collet 3
There is external screw thread, external screw thread can enable nut 51 to be threadedly coupled with first connecting rod 2 with screw-internal thread fit.
Optionally, as shown in figure 3, limit protrusion 33 can be a blocker ring, blocker ring is set to nut 51 far from first
One end of connecting rod 2, the interior diameter of blocker ring are greater than the diameter of the thread segment 12 of sample 1, and are less than the outer of limit protrusion 33
Diameter enables blocker ring to cooperate with limit protrusion 33.
As shown in Figure 3 and Figure 7, clamp assembly can also include the second connecting rod 6, and the second connecting rod 6 has the first connection
End 61 and second connection end 62,24 screw thread of second connection end face of the first connecting pin 61 and first connecting rod 2 of the second connecting rod 6
Connection, the second connection end 62 of the second connecting rod 6 with the telescopic component 81 of fatigue experimental device for connecting.
In one embodiment, as shown in figures 3 and 8, clamp assembly can also include being arranged in the two of the second connecting rod 6
A standby tight part: first for tight part 71 and second for tight part 72；First for the second connection end that tight part 71 includes with first connecting rod 2
The first surface that face 24 cooperates, second for the second surface that tight part 72 includes with the cooperation of the telescopic component 81 of fatigue experimental device
722, and when first occurs the rotation of first direction relative to second for tight part 71 for tight part 72, first surface and second surface
The distance between 722 increase.
In this way, before carrying out fatigue test first standby tight operation can be carried out to clamp assembly, to guarantee first connecting rod
2 stringent centering, and guarantee that there are pretightning forces without pine between first connecting rod 2 and the telescopic component 81 of fatigue experimental device
It is dynamic.After carrying out standby tight operation, then sample 1 is installed and carries out fatigue test.
Standby tight operation can carry out as follows: as shown in figure 11, in the telescopic component 81 of fatigue experimental device
The each loading end for two loading ends being oppositely arranged is respectively mounted the second connecting rod 6, and standby tight for tight part 72 and first by second
Part 71 is sheathed in the second connecting rod 6, and installs first connecting rod 2.Then, it is connected using the standby tight component of fatigue experimental device
First connecting end surface 23 of two first connecting rods 2.It is applied by two loading ends of the telescopic component 81 in fatigue experimental device
The tensile load of increasing, so that the distance between the loading end in the second connection end face 24 of first connecting rod 2 and telescopic component 81
Increase, by rotation first for tight part 71 or the second for tight part 72, so that the distance between first surface and second surface 722 increase
Greatly.When unloading applied tensile load, first connecting rod 2 spring back because drawing force disappears, by standby tight part blocking with stretch
There are pretightning forces between the loading end of contracting component 81.Moreover, when loading end applies tensile load, can be set to
The second connecting rod 6, first connecting rod 2, standby tight component, first connecting rod 2 and the second connecting rod 6 between two loading ends are successively
The structure being formed by connecting is straightened, and realizes that (any connecting rod includes first connecting rod 2 and second for two groups of connecting rods being oppositely arranged
Connecting rod 6) centering
In one embodiment, first includes first annular ontology for tight part 71, and first annular ontology has same flat
First surface in face, and the third surface being oppositely arranged with first surface；Third surface is along first annular body axis side
To the end face extended spirally, and the angle rotated is not more than 360 °.As shown in figure 8, second includes the second annular sheet for tight part 72
Body 721, the second ring body 721 have second surface 722 in the same plane, and be oppositely arranged with second surface 722
4th surface 723；4th surface 723 is along the end face that 721 axis direction of the second ring body extends spirally, and the angle of rotation
No more than 360 °.Optionally, first is identical for tight 72 structure of part with second for tight part 71, and first for tight part 71 third surface
Be engaged with second for the 4th surface 723 of tight part 72, when make first for tight part 71 relative to second for tight part 72 generation
When the rotation of first direction, the distance between first surface and second surface 722 increase；When make first for tight part 71 relative to
Second when the rotation of the second direction opposite with first direction occurring for tight part 72, between first surface and second surface 722
Distance reduces.When having pressure between third surface and the 4th surface 723, first for tight part 71 and second between tight part 72
It is self-locking to can use frictional force.
In the following, as an example, providing a kind of the Nomenclature Composition and Structure of Complexes of clamp assembly.In this example, as shown in Fig. 3~Fig. 8,
Clamp assembly includes that first connecting rod 2, collet 3, pad post 4, connector 5, the second connecting rod 6, first are tight for tight part 71 and second
Spare part.
Wherein, as shown in fig. 6, first connecting rod 2 includes first body of rod 21 and second body of rod 22 of coaxial line connection,
In, the diameter of first body of rod 21 is less than second body of rod 22；End face of first body of rod 21 far from second body of rod 22 is the first connecting pin
Face 23 is provided with binding groove 25 on first connecting end surface 23 of first connecting rod 2, and first body of rod 21 is far from second body of rod 22
One end is provided with external screw thread.Binding groove 25 can be with first body of rod, 21 coaxial line.The second connection end face 24 of first connecting rod 2 is set
It is equipped with the threaded hole with 2 coaxial line of first connecting rod, for being threadedly coupled with the second connecting rod 6.First body of rod 21 and the second bar
Body 22 can be cylindrical body.
Wherein, as shown in figure 5, collet 3 includes the first Gripper body 31 and the second Gripper body 32 of coaxial line connection,
In, the diameter of the first Gripper body 31 is less than the diameter of the second Gripper body 32, and the diameter of the first Gripper body 31 is not more than
The diameter of binding groove 25, so that the first Gripper body 31 is fully inserted into binding groove 25.It is close in the second Gripper body 32
One end of first Gripper body 31 is provided with the limit protrusion 33 of annular；Limit protrusion 33 has the first side being oppositely arranged
And second side, wherein the first side is limit protrusion 33 close to the side surface of the first Gripper body 31, second side is limit protrusion
Side surface of the portion 33 far from the first Gripper body 31.Limit protrusion 33 overall diameter be greater than the second Gripper body 32 diameter,
Greater than binding groove 25 diameter and be not more than first body of rod 21 diameter, allow limit protrusion 33 the first side and first
First connecting end surface 23 of connecting rod 2 is engaged.The installation threaded hole 34 of coaxial line and connection and tight is additionally provided on collet 3
Gu through-hole.Wherein installation threaded hole 34 is set to the one end of collet 3 far from the first Gripper body 31, is provided with internal screw thread, uses
It is threadedly coupled in the thread segment 12 with sample 1.The diameter of fastening through-hole can be identical or not as the installation diameter of threaded hole 34
Together.
As shown in figure 3, pad post 4 can be a cylindrical body, diameter is no more than installation threaded hole 34 and fastening through-hole, one
End can be connect with the slot bottom of binding groove 25, and the other end can be connect with the end face for the thread segment 12 for entering installation threaded hole 34,
It realizes the direct conducting pressure between first connecting rod 2 and sample 1, improves the compactedness of 3 modular construction of collet.
As shown in figure 3, connector 5 may include a tool internal thread nut 51 and be connected to 51 one end of nut in ring
The limit blocking portion 52 of shape.The interior diameter of nut 51 is greater than the diameter of limit protrusion 33 and is equal to the diameter of first body of rod 21,
The internal screw thread of nut 51 and the external screw thread of first body of rod 21 are cooperated, realizes and is threadedly coupled.Blocking portion 52 is limited to be arranged
In the one end of nut 51 far from first connecting rod 2, and interior diameter is greater than the diameter of the second Gripper body 32 and is less than limit protrusion
The overall diameter in portion 33 enables blocker ring to cooperate with the second side for limiting protrusion 33.
As shown in fig. 7, the second connecting rod 6 can be in cylindrical body, and the both ends of the second connecting rod 6 are respectively arranged with outer spiral shell
Line.Second connecting rod 6 is the first connecting pin 61 close to one end of first connecting rod 2, and one end far from first connecting rod 2 is second
Connecting pin 62.It first connecting pin 61 of the second connecting rod 6 can be with the threaded hole on the second connection end face 24 of first connecting rod 2
It is threadedly coupled.External screw thread in the second connection end 62 of second connecting rod 6 can carry out screw thread with the loading end of telescopic component 81
Connection.
As shown in figure 3, standby tight part may include first for tight part 71 and second for tight part 72, first for tight part 71 includes the
One ring body, first annular ontology have first surface in the same plane, and the third being oppositely arranged with first surface
Surface；Third surface is the end face extended spirally along first annular body axis direction, and the angle rotated is not more than 360 °.Such as
Shown in Fig. 8, second includes the second ring body 721 for tight part 72, and the second ring body 721 has second in the same plane
Surface 722, and the 4th surface 723 being oppositely arranged with second surface 722；4th surface 723 is along 721 axis of the second ring body
The end face that line direction extends spirally, and the angle rotated is not more than 360 °.First for tight part 71 and second for the interior straight of tight part 72
Diameter is not less than the diameter of the second connecting rod 6, so that first can be sheathed on the second connection for tight part 71 and second for tight part 72
Bar 6.In further scheme, first is identical for tight 72 structure of part with second for tight part 71, and first for the of tight part 71
Three surfaces are engaged with second for the 4th surface 723 of tight part 72, when make first for tight part 71 relative to second for tight part
When the rotation of 72 generation first directions, the distance between first surface and second surface 722 increase；When making first for tight part 71
When the rotation of the second direction opposite with first direction occurs for tight part 72 relative to second, first surface and second surface 722
The distance between reduce.When having pressure between third surface and the 4th surface 723, first for tight part 71 and second for tight part
It is self-locking to can use frictional force between 72.
The disclosure also provides a kind of fatigue experimental device, which has the above-mentioned fixture group for fatigue test
Clamp assembly described in part embodiment.Due to the clamp assembly and the above-mentioned folder for fatigue test of the fatigue experimental device
It is identical to have clamp assembly described in component embodiment, therefore beneficial effect having the same, details are not described herein for the disclosure.
As shown in Figure 12 and Fig. 9, fatigue experimental device can also include telescopic component 81 and standby tight component.Wherein, such as Fig. 9
Shown, telescopic component 81 may include the adjusting rod 8122 of two loading ends of two loading ends and connection, and adjusting rod 8122 is used for
The distance between two loading ends are adjusted, so that telescopic component 81 applies tensile load or pressure to sample 1 by clamp assembly
Contracting load.
As shown in Figure 12 and Fig. 9, a loading end can be the board 811 of fatigue experimental device, another loading end can
Think a cross bar 8121.In one embodiment, as shown in Figure 10, adjusting rod 8122 and cross bar 8121 are formed by connecting as pull rod
812, and adjusting rod 8122 can be under the action of power mechanism to far from board 811 or close to the movement of the direction of board 811.
When moving when adjusting rod 8122 to the direction far from board 811, cross bar 8121 is moved to the direction far from board 811, so that stretching
Contracting component 81 provides tensile load.When moving when adjusting rod 8122 to the direction close to board 811, cross bar 8121 is to close to board
811 direction movement, so that telescopic component 81 provides compressive load.Screw thread is respectively arranged on board 811 and cross bar 8121
Hole, any threaded hole with a clamp assembly for connecting.In this way, being provided between board 811 and cross bar 8121 opposite
Two groups of clamp assemblies, and the installation threaded hole 34 of two groups of clamp assemblies is oppositely arranged.Two thread segments 12 of sample 1 can be distinguished
It is connect with two installation threaded holes 34, and the end face of thread segment 12 is connect with pad post 4；In this way, sample 1 is by two groups of fixtures
Component is connected on telescopic component 81.
In another embodiment, when carrying out fatigue test, pull rod 812 can be fixed on board 811 and remain stationary,
The power mechanism connecting with the second connecting rod 6 can be set in board 811, and can drive and be attached thereto when power mechanism movement
The second connecting rod 6 moved along 6 extending direction of the second connecting rod, and then realize to sample 1 apply tensile load or compression carry
Lotus.Optionally, power mechanism can be fixed on for the cylinder body of cylinder perhaps oil cylinder cylinder perhaps oil cylinder 811 cylinder of board or
The push rod end of oil cylinder is threadedly coupled with the second connecting rod 6.
In one embodiment, as shown in figure 12, fatigue experimental device can also include extensometer 91, and extensometer 91 is used for
It is fixed on the surface of the test section 11 of sample 1, for measuring deformation quantity of the sample 1 under load effect.
In one embodiment, fatigue experimental device can also include heating component, for use in assessment sample 1 in high temperature
Under anti-fatigue performance.As shown in Figure 12 and Figure 13, heating component may include high temperature furnace 92, can be set on high temperature furnace 92 in
The opening of clamp assembly cooperation, penetrates clamp assembly in the high temperature furnace 92 and sample 1 is made to be placed in the high temperature furnace 92
In be added into.It can also include heat preservation member, such as asbestos etc., so as to the heat preservation of high temperature furnace 92 that component, which is added,.For example, work as closure
After high temperature furnace 92, asbestos are filled between the opening and clamp assembly of high temperature furnace 92.
In one embodiment, fatigue experimental device can be with thermocouple, for measuring the temperature of sample 1.Thermocouple
Quantity can be respectively arranged at the different location of sample 1 to be multiple.For example, the quantity of thermocouple can be three, along examination
The axis direction difference bind of sample 1 is at the middle part and both ends of sample 1.
The disclosure also provides a kind of nickel-based monocrystal small sample fatigue test system, including above-mentioned nickel-base high-temperature single crystal alloy
Sample, and including above-mentioned clamp assembly.It is understood that the nickel-based monocrystal small sample fatigue test system can also wrap
Other assemblies are included, other assemblies and clamp assembly form above-mentioned fatigue experimental device.
Due to the nickel-base high-temperature single crystal alloy sample and above-mentioned Ni-based list in the nickel-based monocrystal small sample fatigue test system
Nickel-base high-temperature single crystal alloy sample in brilliant superalloy coupons embodiment is identical, therefore beneficial effect having the same, this
It is published here and repeats no more.
It is understood that the small sample in nickel-based monocrystal small sample fatigue test system, as nickel-based monocrystal high temperature close
Golden sample.
The disclosure also provides a kind of nickel-based monocrystal small sample fatigue test method, applied to above-mentioned nickel-based monocrystal small sample
Fatigue test system.The nickel-based monocrystal small sample fatigue test method includes:
The nickel-base high-temperature single crystal alloy sample is connected to the clamp assembly；
The clamp assembly is connected to the telescopic component of the fatigue experimental device；
The telescopic component loads tensile load or compressive load to the sample.
The details and principle of the nickel-based monocrystal small sample fatigue test method of the disclosure are implemented in above-mentioned fatigue experimental device
It is described in detail in mode, details are not described herein for the disclosure.
It should be appreciated that the disclosure is not limited in its application to the detailed construction and arrangement of the component of this specification proposition
Mode.The disclosure can have other embodiments, and can realize and execute in many ways.Aforesaid deformation form and
Modification is fallen within the scope of this disclosure.It should be appreciated that this disclosure and the disclosure of restriction extend in text
And/or it is mentioned in attached drawing or all alternative combinations of two or more apparent independent features.It is all these different
Combination constitutes multiple alternative aspects of the disclosure.Embodiment described in this specification illustrates to become known for realizing the disclosure
Best mode, and those skilled in the art will be enable using the disclosure.
Claims (10)
1. a kind of nickel-base high-temperature single crystal alloy sample for fatigue test, which is characterized in that the sample includes:
Test section；
Thread segment, quantity are two and are connected to the both ends of the test section.
2. sample according to claim 1, which is characterized in that the sample further include:
Linkage section, quantity are two；Any linkage section connects the test section and the thread segment.
3. sample according to claim 2, which is characterized in that the test section is cylinder；
The thread segment and the test section are coaxially disposed, and the diameter of the thread segment is greater than the diameter of the test section；
The linkage section and the test section are coaxially disposed, and the bus of the test section is camber line；The linkage section with it is described
The diameter of one end of test section connection is identical as the diameter of the test section；One end that the linkage section is connect with the thread segment
Diameter it is identical as the diameter of the thread segment.
4. described in any item samples according to claim 1~3, which is characterized in that the sample is from engine thermal end pieces
Processing.
5. a kind of clamp assembly for fatigue test, for cooperating with the described in any item samples of Claims 1 to 4；It is special
Sign is that the clamp assembly includes:
First connecting rod, has the first connecting end surface for being oppositely arranged and a second connection end face, and the first of the first connecting rod
Connecting end surface is provided with binding groove, and the second connection end face of the first connecting rod is for flexible group with a fatigue experimental device
Part connection；
Collet, is provided with the installation threaded hole and fastening through-hole of coaxial line and connection, and the installation threaded hole is used for and the examination
The thread segment of sample cooperates；It is inserted into the binding groove to one end fits of the collet far from the installation threaded hole；
Pad post can be arranged in the installation threaded hole and the fastening through-hole, and one end of the pad post is used for and the spiral shell
The connection of line section, the other end are connect with the slot bottom of the binding groove；
Connector connects the first connecting rod and the collet.
6. clamp assembly according to claim 5, which is characterized in that limit protrusion is provided on the collet, it is described
Limit protrusion has the first side being oppositely arranged and second side；First side of the limit protrusion and the first connecting rod
The first connecting end surface cooperation；
The connector is threadedly coupled with the first connecting rod, and the connector is provided with limit blocking portion, the limit
Second side of blocking portion and the limit protrusion cooperates.
7. clamp assembly according to claim 5, which is characterized in that the clamp assembly further include:
Second connecting rod has the first connecting pin and second connection end, the first connecting pin of second connecting rod and described the
The second connection end face of one connecting rod is threadedly coupled, and the second connection end of second connecting rod is used to fill with the fatigue test
The telescopic component connection set.
8. clamp assembly according to claim 7, which is characterized in that the clamp assembly further includes being arranged in described second
The first of connecting rod is for tight part and second for tight part；Described first for the second connection end that tight part includes with the first connecting rod
The first surface of face cooperation, described second for the second table that tight part includes with the cooperation of the telescopic component of the fatigue experimental device
Face, and when described first for tight part relative to described second for tight part occur first direction rotation when, the first surface with
The distance between described second surface increases.
9. a kind of nickel-based monocrystal small sample fatigue test system, which is characterized in that described in any item including Claims 1 to 4
Nickel-base high-temperature single crystal alloy sample, and including the described in any item clamp assemblies of claim 5~8.
10. a kind of nickel-based monocrystal small sample fatigue test method is applied to nickel-based monocrystal small sample fatigue as claimed in claim 9
Pilot system, which is characterized in that nickel-based monocrystal small sample fatigue test method includes:
The nickel-base high-temperature single crystal alloy sample is connected to the clamp assembly；
The clamp assembly is connected to the telescopic component of the fatigue experimental device；
The telescopic component loads tensile load or compressive load to the sample.
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| CN201910292723.6A CN110044743A (en) | 2019-04-12 | 2019-04-12 | Nickel-based monocrystal small sample fatigue test system and method |
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| CN111006943A (en) * | 2019-12-09 | 2020-04-14 | 西北工业大学 | High-temperature fatigue clamp and high-temperature fatigue test equipment for nickel-based single crystal small test piece |
| CN113281192A (en) * | 2021-06-18 | 2021-08-20 | 中国船舶重工集团公司第七二五研究所 | Cold-hot alternating fatigue test method under constant stress |
| CN114577591A (en) * | 2022-02-23 | 2022-06-03 | 华东理工大学 | Fatigue test fixture for plate-shaped sample |
| CN115389312A (en) * | 2022-09-15 | 2022-11-25 | 上海航空材料结构检测股份有限公司 | Plate-shaped sample ultra-high temperature low-cycle fatigue test fixture, clamping device and test device |
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