CN110044702A - Vacuum sound emission nondestructive detection system - Google Patents
Vacuum sound emission nondestructive detection system Download PDFInfo
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- CN110044702A CN110044702A CN201910368685.8A CN201910368685A CN110044702A CN 110044702 A CN110044702 A CN 110044702A CN 201910368685 A CN201910368685 A CN 201910368685A CN 110044702 A CN110044702 A CN 110044702A
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Classifications
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- 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
- G01N3/06—Special adaptations of indicating or recording means
-
- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- 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
- G01N2203/0017—Tensile
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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
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
- G01N2203/0064—Initiation of crack
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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
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0062—Crack or flaws
- G01N2203/0066—Propagation of crack
-
- 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
- G01N2203/022—Environment of the test
- G01N2203/0244—Tests performed "in situ" or after "in situ" use
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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
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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
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
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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
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0658—Indicating or recording means; Sensing means using acoustic or ultrasonic detectors
Abstract
The invention discloses a kind of vacuum sound emission nondestructive detection systems, comprising: original position stretching machine；Matrix of samples, matrix of samples are fixed on original position stretching machine；Scanning electron microscope, scanning electron microscope have vacuum sample storehouse, and original position stretching machine is set in vacuum sample storehouse；Computer system, computer system are connected with scanning electron microscope and original position stretching machine respectively；Acoustic emission detection probe, acoustic emission detection probe are set in vacuum sample storehouse and contact with matrix of samples；Signal amplifier, signal amplifier are set to outside vacuum sample storehouse and are connected by cable with acoustic emission detection probe；Signal processor, signal processor are connected with signal amplifier.Vacuum sound emission nondestructive detection system according to an embodiment of the present invention is while realizing sound emission non-destructive testing, the dehiscence process of coating material can be observed, in detail conducive to the micromechanism of damage of the analysis coating material germinating of crackle and extension mechanism and material during stretching.
Description
Technical field
The present invention relates to field of non destructive testing, more particularly, to a kind of vacuum sound emission nondestructive detection system.
Background technique
Probing into for coating material mechanics properties testing and micromechanism of damage in the related technology is usually tried using universal tensile
Machine is tested to carry out under macro-scale, for example, by using the tension crack process of the method observation coating of high resolution camera shooting, and
In conjunction with the strain variation situation of Digital Image Correlation Method measurement coating front surface.
Since coating material mostly passes through what the methods of plasma spraying or physical vapour deposition (PVD) were prepared, due to spray
The particularity of coating method, the coating thickness of coating material may be subjected to limitation, such as the spraying system of certain ceramic coating materials
Standby thickness is generally within the scope of tens microns to several millimeters, since thickness is smaller, even if so utilizing under macro-scale
High resolution camera also it is more difficult in detail observe coating material dehiscence process, coating material can not be effectively observed and stretched
The micromechanism of damage of the germinating of crackle and extension mechanism and material in journey.
Summary of the invention
The present invention is directed at least solve one of the technical problems existing in the prior art.For this purpose, one object of the present invention
It is to propose a kind of vacuum sound emission nondestructive detection system, which is realizing the lossless inspection of sound emission
While survey, the dehiscence process of coating material can be observed in detail, conducive to analysis coating material crackle during stretching
The micromechanism of damage of germinating and extension mechanism and material.
Embodiment according to the present invention proposes a kind of vacuum sound emission nondestructive detection system, the lossless inspection of vacuum sound emission
Examining system includes: original position stretching machine；Matrix of samples, the matrix of samples are equipped with the spray-coating surface of coating to be measured, the matrix of samples
It is fixed on the original position stretching machine, the original position stretching machine stretches the matrix of samples and coating to be measured thereon when working；It sweeps
Electron microscope is retouched, the scanning electron microscope has vacuum sample storehouse, and the original position stretching machine is set to the vacuum sample
In storehouse, the scanning electron microscope continuously shot images or progress overall process video recording when the coating to be measured is stretched；Meter
Calculation machine system, the computer system are connected with the scanning electron microscope and the original position stretching machine respectively；Sound emission inspection
Probing head, the acoustic emission detection probe are set in the vacuum sample storehouse and contact with the matrix of samples；Signal amplifier,
The signal amplifier is set to outside the vacuum sample storehouse and is connected by cable with acoustic emission detection probe；Signal processing
Device, the signal processor are connected with the signal amplifier.
Vacuum sound emission nondestructive detection system according to an embodiment of the present invention is while realizing sound emission non-destructive testing, energy
Enough dehiscence process for observing coating material in detail, conducive to the coating material germinating of crackle and striking machine during stretching is analyzed
The micromechanism of damage of system and material.
Some specific embodiments according to the present invention, the acoustic emission detection probe includes: magnetic crust, the matrix of samples
For metalwork, the magnetic crust is adsorbed in the matrix of samples；Probe body, the probe body be set to the magnetic crust in and
It is connected by the cable with the signal amplifier.
Further, the magnetic crust includes: cylinder, the both ends open of the cylinder；End cap, described in end cap capping
One end of cylinder, the end cap are adsorbed in the matrix of samples, and the probe body is matched with institute from the other end of the cylinder
It states in cylinder.
Further, one end far from the end cap of the cylinder is equipped with crossed beam trunking, and the cable crosses line across described
Slot.
Some specific embodiments according to the present invention, the sound emission nondestructive detection system further include: sealed guide device,
The side wall in the vacuum sample storehouse is equipped with the cable-through hole passed through for the cable, and the sealed guide device is installed on the side wall
Cable-through hole at and with the cable cooperate, between the sealed guide device seals between the cable and the cable-through hole
Gap.
Further, the sealed guide device includes: conduit, and the conduit passes through the cable-through hole from the side
The side of wall is worn to the other side, and the cable passes through the conduit；Sealing cover, the sealing cover are threadedly engaged in the conducting wire
Pipe, the sealing cover has flexible top and the flexible top is configured with the self-sealing cable port with cable cooperation.
Further, one end of the conduit is configured with baffle ring, and the baffle ring backstop is described in the side wall
Side and between the side wall be equipped with flexible gaskets.
Some specific embodiments according to the present invention, the original position stretching machine includes: workbench；First objective table and second
Objective table, first objective table and second objective table are set to the workbench, first objective table and described second
At least one of objective table can be mobile to the direction far from another, and one end of the matrix of samples is fixed on described first and is carried
Object platform and the other end are fixed on second objective table；Driver, the driver and first objective table and described second
At least one described transmission connection in objective table.
Further, first objective table is equipped with dismountable first clamping plate, and second objective table is equipped with detachable
Second clamping plate, one end of the matrix of samples is clamped between first objective table and the first clamping plate and the other end
It is clamped between second objective table and the second clamping plate.
Some specific embodiments according to the present invention, the matrix of samples include the first matrix of samples and the second sample base
Body, first matrix of samples include: the first fixed section and the second fixed section, first fixed section and second fixed section
It is fixed on the original position stretching machine；First linkage section, first linkage section are connected to first fixed section and described second
Between fixed section；Wherein, the width of first fixed section is equal with the width of second fixed section and is greater than described first
The width of linkage section, the thickness of the thickness of first fixed section, the thickness of second fixed section and first linkage section
It is equal to each other, the upper surface of first linkage section is formed with the first spray-coating surface；Second matrix of samples includes: that third is fixed
Section and the 4th fixed section, the third fixed section and the 4th fixed section are fixed on the original position stretching machine；Second linkage section,
Second linkage section is connected between the third fixed section and the 4th fixed section；Wherein, the third fixed section
Width is equal with the width of the 4th fixed section and is greater than the width of second linkage section, the thickness of the third fixed section
Thickness that is equal with the thickness of the 4th fixed section and being less than second linkage section, the side surface shape of second linkage section
At there is the second spray-coating surface.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is the structural schematic diagram of vacuum sound emission nondestructive detection system according to an embodiment of the present invention.
Fig. 2 is the structural representation of the first matrix of samples of vacuum sound emission nondestructive detection system according to an embodiment of the present invention
Figure.
Fig. 3 is the structural representation of the second matrix of samples of vacuum sound emission nondestructive detection system according to an embodiment of the present invention
Figure.
Fig. 4 is that the structure of the acoustic emission detection probe of vacuum sound emission nondestructive detection system according to an embodiment of the present invention is shown
It is intended to.
Fig. 5 is the structural representation of the sealed guide device of vacuum sound emission nondestructive detection system according to an embodiment of the present invention
Figure.
Appended drawing reference:
Vacuum sound emission nondestructive detection system 1,
Original position stretching machine 100, workbench 110, slide rail 111, anticreep groove 112, the first objective table 120, first folder
Plate 121, the first threaded hole 122, the first dowel hole 123, the second objective table 130, second clamping plate 131, the second threaded hole 132,
Second dowel hole 133, driver 140, sliding guide 141, drive screw 142,
First matrix of samples 200, the first fixed section 210, the second fixed section 220, the first linkage section 230, the first spray-coating surface
231、
Second matrix of samples 300, third fixed section 310, the 4th fixed section 320, the second linkage section 330, the second spray-coating surface
331、
Vacuum sample storehouse 400,
Acoustic emission detection probe 500, magnetic crust 510, cylinder 511, end cap 512, crossed beam trunking 513, probe body 520, line
Cable 530,
Sealed guide device 600, conduit 610, baffle ring 611, flexible gaskets 612, sealing cover 620, flexible top
621, self-sealing cable port 622.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.In the present invention
Description in, " fisrt feature ", " second feature " may include one or more of the features.In the description of the present invention,
The meaning of " plurality " is two or more.
Coating material mechanics properties testing and micromechanism of damage are probed into the related technology and tested mostly using universal tensile
Machine carries out under macro-scale, generallys use the tension crack process of the method observation coating of high resolution camera shooting, and ties
Close the strain variation situation of Digital Image Correlation Method measurement coating front surface.
It needs to make tensile sample matrix under normal conditions, coating material to be tested is then sprayed on basis material, it
Typical spray speckle is carried out to coating material surface afterwards, it is therefore an objective to calculate strain for subsequent digital image correlation method and mark is provided
Point.Tension test is carried out to tensile sample using universal tensile testing machine after being ready to complete, needs to utilize height in experimentation
Resolution camera records drawing process to observe the detailed process of coating cracking, and serialograph, so as to utilize number
The strain variation situation of word DIC Method calculating coating front surface.
The changing rule of speckle during stretching is calculated using digital picture related algorithm, obtains strain stress relation.It will apply
Layer material is broadly divided into 4 stages to face crack cracking in receiving tensile load:
(1) when coating just starts to bear tensile load, irregular variation is presented in strain；
(2) with the increase of tensile load, coating surface strain is orderly fluctuation status, is similar to sine curve, maximum
Strain is respectively wave crest and trough with minimum strain, and wave crest and trough are constantly mobile to same direction；
(3) when tensile load reaches certain phase, the fraction areal strain of coating is sharply increased；
(4) it when the strain of the coating area sharply increased reaches capacity, i.e., the stress in region reaches ultimate tensile, applies
Layer is broken.
But since coating is too thin, this method can only detect coating surface strain variation and crack propagation, can not observe
The changing rule extended to the lateral position Interface Crack and face crack of coating to Interface Crack.
The observing interface crackle and face crack generallyd use to the method that Interface Crack extends be by controlling omnipotent examination
Test the load gradual change realization of machine.Such as prepare the identical multiple matrix of samples for being coated with coating material of parameter, respectively with gradually
Increased constantly acting load tensile sample matrix stops stretching, sample is removed tensile sample when stretching reaches determined load
Section metallographic specimen is made, observed under a scanning electron microscope to determine crackle form in drawing process and crackle transformation
Process.But this method can not real time reaction crackle expansion process, and the selection of load range have it is certain random
Property, cause resulting crackle discontinuous with tensile load changing rule, the accuracy of crack propagation process may be will affect.In addition
It is lack of standardization due to grinding and polishing in the preparation process of observation sample, it is likely to result in cracked inside brittle coating, influences to tie
The accuracy of fruit observation.
In view of the status of the relevant technologies coating material tension test observed pattern, embodiment according to the present invention is proposed
A kind of vacuum sound emission nondestructive detection system 1, it is lossless below with reference to the accompanying drawings to describe vacuum sound emission according to an embodiment of the present invention
Detection system 1.
As Figure 1-Figure 5, vacuum sound emission nondestructive detection system 1 according to an embodiment of the present invention includes original position stretching machine
100, matrix of samples, scanning electron microscope, computer system (not shown), acoustic emission detection probe 500, signal amplification
Device (not shown) and signal processor (not shown).
The matrix of samples is equipped with the spray-coating surface of coating to be measured, and the matrix of samples is fixed on original position stretching machine 100, in situ
Stretching-machine 100 stretches the matrix of samples and coating to be measured thereon when working.The scanning electron microscope has vacuum sample
Product storehouse 400, original position stretching machine 100 are set in vacuum sample storehouse 400, and the scanning electron microscope is drawn in the coating to be measured
Continuously shot images or progress overall process video recording when stretching.The computer system respectively with the scanning electron microscope and original position
Stretching-machine 100 is connected, using loading by means of digital image correlation method to picture handled to obtain coating material surface strain size and
Its change procedure.
Acoustic emission detection probe 500 is set in vacuum sample storehouse 400 and contacts with matrix of samples.The signal amplifier is set
It is outer in vacuum sample storehouse 400 and be connected with acoustic emission detection probe 500 signal processor described in and the letter by cable 530
Number amplifier is connected.When the coating to be measured is stretched, coating material cracks and in crack propagation process, can release
Stress wave receives stress wave using acoustic emission detection probe 500, is converted into electric signal, then in turn through signal amplifier, letter
It can be obtained and record corresponding acoustic emission signal after number processor, then handled by the corresponding data to acoustic emission signal, can be obtained
The relevant information of the variation occurred inside to coating material.
Vacuum sound emission nondestructive detection system 1 according to an embodiment of the present invention can be placed in scanning electron by setting
Original position stretching machine 100 in microscopical vacuum sample storehouse 400, so as to using the scanning electron microscope to stretching
Journey is observed, and is realized the dehiscence process from micro-nano rank observation coating, can clearly be captured the tool of coating cracking
Body process, the position including crack initiation, the path of crack propagation and speed etc..It is put furthermore with scanning electron microscope in height
In-situ observation is carried out under big multiple, can observe the variation of coating material microscopic appearance, facilitates the machine for analyzing coating cracking
Reason.
It for example, during stretching can be with synchronous recording displacement/load signal, so as to realize to coating material
The analysis of mechanical property；And the change procedure of coating material can be recorded, under micro-nano-scale so as to infer coating
Micromechanism of damage of material during stretching/compressing；A label is identified on coating surface to be observed with nano-imprinting method
Later, the image shot during stretching experiment using loading by means of digital image correlation method processing scanning electron microscope, can obtain
Obtain the strain size and local train change procedure of coating surface.
Also, it, can be true by further setting acoustic emission detection probe 500, signal amplifier and signal processor
Sound emission non-destructive testing is carried out under Altitude.
Therefore, vacuum sound emission nondestructive detection system 1 according to an embodiment of the present invention is realizing sound emission non-destructive testing
Meanwhile, it is capable to observe the dehiscence process of coating material, in detail conducive to the germinating of analysis coating material crackle during stretching
With the micromechanism of damage of extension mechanism and material.
In some embodiments of the invention, as shown in figure 4, acoustic emission detection probe 500 includes 510 He of magnetic crust
Probe body 520.
The matrix of samples is metalwork, such as ferrous alloy part, and magnetic crust 510 is using magnetic absorption in the sample base
Body.Probe body 520 is set in magnetic crust 510 and is connected by cable 530 with the signal amplifier.
Due to the size limitation in the vacuum sample storehouse 400 of scanning electron microscope, original position stretching machine 100 and matrix of samples
Size is smaller, by the way that magnetic crust 510 is arranged, so as to which acoustic emission detection probe 500 is quickly and conveniently fixed on sample
On matrix, so that acoustic emission detection probe 500 is in close contact with matrix of samples.
Specifically, magnetic crust 510 includes cylinder 511 and end cap 512.The both ends open of cylinder 511, end cap 512 cover
One end of cylinder 511, end cap 512 are adsorbed in the matrix of samples, and probe body 520 is matched with cylinder from the other end of cylinder 511
In body 511.
Wherein, for the ease of cabling, one end of the separate end cap 512 of cylinder 511 is equipped with crossed beam trunking 513, and cable 530 passes through
Crossed beam trunking 513.
In some specific examples of the invention, as shown in figure 5, vacuum sound emission nondestructive detection system 1 further includes sealing
Wire installation 600.
The side wall in vacuum sample storehouse 400 is equipped with the cable-through hole passed through for cable 530, and sealed guide device 600 is installed on institute
It states at the cable-through hole of side wall and cooperates with cable 530, sealed guide device 600 seals between cable 530 and the cable-through hole
Gap.
Specifically, sealed guide device 600 includes conduit 610 and sealing cover 620.
Conduit 610 is worn from the side of the side wall to the other side by the cable-through hole, such as is worn from inside to outside,
The outer peripheral surface of conduit 610 and the inner peripheral surface of cable-through hole fit closely, and cable 530 passes through conduit 610.620 screw thread of sealing cover
Be matched with conduit 610, sealing cover 620 has flexible top 621 and flexible top 621 be configured with cable 530 cooperate from
Seal cable port 622.
Wherein, one end of conduit 610 is configured with baffle ring 611, and 611 backstop of baffle ring is in the side of the side wall
(such as inside), and flexible gaskets 612 are equipped between baffle ring 611 and the side wall, flexible top 621 and flexible gaskets 612 can
To use silicone rubber material.
Since original position stretching machine 100 is in vacuum sample storehouse 400, entire working environment is airtight vacuum environment, and sound
Transmitting detection probe 500 need to be contacted with matrix of samples, be then connected by cable 530 with external signal amplifier, therefore,
It, can be while keeping vacuum tightness environment by the cable of acoustic emission detection probe 500 by the way that sealed guide device 600 is arranged
530 pick out outside vacuum sample storehouse 400.
In some embodiments of the invention, as shown in Figure 1, original position stretching machine 100 includes workbench 110, first
Objective table 120, the second objective table 130 and driver 140.
First objective table 120 and the second objective table 130 are set to workbench 110, the first objective table 120 and the second objective table
At least one of 130 can be mobile to the direction far from another, and the first objective table 120 is fixed in one end of the matrix of samples
And the other end is fixed on the second objective table 130.In driver 140 and the first objective table 120 and the second objective table 130 it is described extremely
A few transmission connection, when the first objective table 120 and the second objective table 130 are relatively distant from movement, tensile sample matrix, to draw
Stretch the coating material in matrix of samples.
Further, workbench 110 is equipped with slide rail 111, the institute in the first objective table 120 and the second objective table 130
It states at least one to slidably engage in slide rail 111, to guarantee that the first objective table 120 and/or the second objective table 130 are mobile
When with the alignment of workbench 110.Driver 140 is connected with sliding guide 141, the first objective table 120 and the second objective table 130
In it is described at least one slidably engage in sliding guide 141, to guarantee the first objective table 120 and/or the second objective table
130 it is mobile when alignment with driver 140.
Wherein, the both side surface of slide rail 111 is equipped with anticreep groove 112, the first objective table 120 and the second objective table
In 130 it is described at least one be equipped with and be matched with the anticreep rib of anticreep groove 112, to prevent the first objective table 120 and second
At least one described disengaging slide rail 111 in objective table 130.
In some specific examples of the invention, driver 140 is servo motor, and the motor shaft of the servo motor passes through
Shaft coupling is connected with drive screw 142, in drive screw 142 and the first objective table 120 and the second objective table 130 it is described at least
One is threadedly engaged, by the rotary motion of motor shaft be converted into the first objective table 120 and the second objective table 130 described in extremely
Few one linear movement.For example, there is contrary screw thread at the both ends of drive screw 142 respectively, drive screw 142 turns
The dynamic function of driving the first objective table 120 and the second objective table 130 to reach stretching to reverse movement respectively.
In some embodiments of the invention, as shown in Figure 1, the first objective table 120 is equipped with dismountable first folder
Plate 121, the second objective table 130 are equipped with dismountable second clamping plate 131, and one end of the matrix of samples is clamped in the first loading
Between platform 120 and first clamping plate 121, the other end of the matrix of samples is clamped in the second objective table 130 and second clamping plate 131
Between.
Specifically, as shown in Figure 1, first clamping plate 121 is equipped with the first threaded hole 122 and the first dowel hole 123, example
Such as, the first threaded hole 122 is two and the first dowel hole 123 is located between two the first threaded holes 122, first clamping plate 121
The first threaded fastener (such as bolt) by being matched with the first threaded hole 122 is removably installed in the first objective table 120,
First clamping plate 121 carries out described one end of the matrix of samples by being matched with the first positioning pin of the first dowel hole 123
Fixed, which can be further inserted into the first objective table 120.
Second clamping plate 131 is equipped with the second threaded hole 132 and the second dowel hole 133, for example, the second threaded hole 132 is two
A and the second dowel hole 133 is located between two the second threaded holes 132, and second clamping plate 131 is by being matched with the second threaded hole
132 the second threaded fastener (such as bolt) is removably installed in the second objective table 130, and second clamping plate 131 passes through cooperation
The other end of the matrix of samples is fixed in the second positioning pin of the second dowel hole 133, second positioning pin
The second objective table 130 can be further inserted into.
In some specific examples of the invention, the rate of extension, maximum load of original position stretching machine 100, scanning electron are aobvious
The amplification factor and observation scope of micro mirror can real-time quantitative adjust, rate of extension may be implemented in 0.036mm/min~1mm/min
In the range of linear regulation, maximum load amount can reach 1kN, stretches maximum range up to 10mm, can meet different performance
The testing requirement of coating material.
In view of the coating of such as ceramic fragile material, elastic deformation stage is very short during stretching, fracture behaviour
Generation is very rapid, when being tested using large-scale cupping machine, since testing machine tensile load is higher, stretches speed
Rate is very fast, therefore is difficult to capture the detailed fracture process of coating material.
Original position stretching machine 100 according to an embodiment of the present invention, rate of extension adjustable extent is in 0.036mm/min-
Within the scope of 1mm/min, by slowing down rate of extension, it can be achieved that " delay " Tensile Fracture Process to brittle ceramic coating, thus
Observation coating material may be implemented slowly to crack to the detailed process for disconnecting peeling.
In some embodiments of the invention, as shown in Figures 2 and 3, the matrix of samples includes the first sample base
Body 200 and the second matrix of samples 300.Wherein, from the first matrix of samples 200 is used to carry out from the front of coating material, second
Matrix of samples 300 is for from carrying out from the side of coating, crackle to sprout when thus, it is possible to obtain coating cracking in further detail
The relevant informations such as raw and extension and surface strain situation of change.
Specifically, as shown in Fig. 2, the first matrix of samples 200 includes the first fixed section 210, the second fixed section 220 and the
One linkage section 230.
First fixed section 210 and the second fixed section 220 are respectively equipped with location hole, to pass through the first positioning pin and the respectively
Two positioning pins are fixed on the first objective table 120 and the second objective table 130.First linkage section 230 is connected to 210 He of the first fixed section
Between second fixed section 220.
Wherein, the width of the first fixed section 210 is equal with the width of the second fixed section 220 and is greater than the first linkage section 230
Width, the thickness of the first fixed section 210, the second fixed section 220 the thickness of thickness and the first linkage section 230 be equal to each other,
The upper surface of first linkage section 230 is formed with the first spray-coating surface 231, and coating spraying is convenient for scanning electron in the first spray-coating surface 231
The front of micro- sem observation coating.
As shown in figure 3, the second matrix of samples 300 includes third fixed section 310, the 4th fixed section 320 and the second linkage section
330。
Third fixed section 310 and the 4th fixed section 320 are respectively equipped with location hole, to pass through the first positioning pin and the respectively
Two positioning pins are fixed on the first objective table 120 and the second objective table 130.Second linkage section 330 is connected to 310 He of third fixed section
Between 4th fixed section 320.
Wherein, the width of third fixed section 310 is equal with the width of the 4th fixed section 320 and is greater than the second linkage section 330
Width, the thickness of third fixed section 310 is equal with the thickness of the 4th fixed section 320 and thickness less than the second linkage section 330,
The side surface of second linkage section 330 is formed with the second spray-coating surface 331, and coating spraying is convenient for scanning electron in the second spray-coating surface 331
The side of micro- sem observation coating.
By designing the matrix of samples of two kinds of different structures, coating material can be effectively observed after spraying and is being drawn
The situation of change of front surface and side during stretching can stretch in addition by the high-amplification-factor of scanning electron microscope
Processing is marked using nano-imprinting method to the front of coating and side before test, then utilizes loading by means of digital image correlation method
The photo that processing scanning electron microscope is shot can obtain the strained situation of coating front and side simultaneously.
Citing describes the course of work of vacuum sound emission nondestructive detection system 1 according to an embodiment of the present invention below.
For coating material to be observed, it is necessary first to matrix of samples is chosen according to coating material attribute, then in sample base
Coating material to be observed is sprayed on body, is carried out later using nanometer embossing on the surface to be observed (front or side) of coating
Location hole in matrix of samples is aligned by the label of speckle with the location hole on the first objective table 120 and the second objective table 130,
Cover first clamping plate 121 and second clamping plate 131, be inserted into the first positioning pin and the second positioning pin, tighten the first threaded fastener and
Second threaded fastener after being then dusted processing to original position stretching machine 100, is sent into scanning electron microscope, vacuum sample
400 side of product storehouse has chip and scanning electron microscope to connect, it can be achieved that control of the computer system to original position stretching machine 100
System.Rate of extension, the parameters such as tensile load are set on the computer systems, then adjust scanning electron microscope to suitably putting
Big multiple finds region to be observed to defocused.It is then turned on scanning electron microscope kinescope recording function, can start to stretch real
It tests and is observed, original position stretching machine 100 can be suspended at any time during stretching, then carry out high power using scanning electron microscope
Number photographing operation can get the correlated process picture of coating germinating and extension.At the same time, acoustic emission detection probe 500 receives
Stress wave is converted into electric signal, sends out then in turn through can be obtained after signal amplifier, signal processor and record corresponding sound
Signal is penetrated, then is handled by the corresponding data to acoustic emission signal, the related letter of the variation occurred inside coating material can be obtained
Breath.
Vacuum sound emission nondestructive detection system 1 according to an embodiment of the present invention, using scanning electron microscope from microcosmic ruler
The tension crack process that thin coating materials are observed on degree, can show damage and cracking of the material under the conditions of extension test completely
Process.And it is possible to which the rate of extension and load by adjusting original position stretching machine 100 realize that brittle coating material slowly cracked
Journey.Furthermore, it is possible to the strained situation of coating front surface and side be measured simultaneously, using scanning electron microscope to extension test mistake
Cheng Jinhang is recorded at any time or whole record, and can be realized sound emission non-destructive testing.
In the description of this specification, the description of reference term " specific embodiment ", " specific example " etc. means to combine and be somebody's turn to do
Embodiment or example particular features, structures, materials, or characteristics described are contained at least one embodiment of the present invention or show
In example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (10)
1. a kind of vacuum sound emission nondestructive detection system characterized by comprising
Original position stretching machine；
Matrix of samples, the matrix of samples are equipped with the spray-coating surface of coating to be measured, and the matrix of samples is fixed on the original position stretching
Machine, the original position stretching machine stretch the matrix of samples and coating to be measured thereon when working；
Scanning electron microscope, the scanning electron microscope have vacuum sample storehouse, and the original position stretching machine is set to described true
In empty sample bin, the scanning electron microscope continuously shot images or progress overall process record when the coating to be measured is stretched
Picture；
Computer system, the computer system are connected with the scanning electron microscope and the original position stretching machine respectively；
Acoustic emission detection probe, the acoustic emission detection probe are set in the vacuum sample storehouse and connect with the matrix of samples
Touching；
Signal amplifier, the signal amplifier are set to outside the vacuum sample storehouse and are visited by cable and the acoustic emission detection
Head is connected；
Signal processor, the signal processor are connected with the signal amplifier.
2. vacuum sound emission nondestructive detection system according to claim 1, which is characterized in that the acoustic emission detection probe
Include:
Magnetic crust, the matrix of samples are metalwork, and the magnetic crust is adsorbed in the matrix of samples；
Probe body, the probe body are set in the magnetic crust and are connected by the cable with the signal amplifier.
3. vacuum sound emission nondestructive detection system according to claim 2, which is characterized in that the magnetic crust includes:
Cylinder, the both ends open of the cylinder；
End cap, the end cap cover one end of the cylinder, and the end cap is adsorbed in the matrix of samples, the probe body from
The other end of the cylinder is matched in the cylinder.
4. vacuum sound emission nondestructive detection system according to claim 3, which is characterized in that the cylinder far from described
One end of end cap is equipped with crossed beam trunking, and the cable passes through the crossed beam trunking.
5. vacuum sound emission nondestructive detection system according to claim 1, which is characterized in that further include:
Sealed guide device, the side wall in the vacuum sample storehouse are equipped with the cable-through hole passed through for the cable, the sealed guide
Device is installed at the cable-through hole of the side wall and cooperates with the cable, and the sealed guide device seals the cable and institute
State the gap between cable-through hole.
6. vacuum sound emission nondestructive detection system according to claim 5, which is characterized in that the sealed guide device packet
It includes:
Conduit, the conduit are worn from the side of the side wall to the other side by the cable-through hole, and the cable passes through institute
State conduit；
Sealing cover, the sealing cover are threadedly engaged in the conduit, and the sealing cover has flexible top and the flexible top
Cage structure has the self-sealing cable port with cable cooperation.
7. vacuum sound emission nondestructive detection system according to claim 6, which is characterized in that one end structure of the conduit
Made baffle ring, the baffle ring backstop the side wall the side and be equipped between the side wall flexible gaskets.
8. vacuum sound emission nondestructive detection system described in any one of -7 according to claim 1, which is characterized in that the original position
Stretching-machine includes:
Workbench；
First objective table and the second objective table, first objective table and second objective table are set to the workbench, described
At least one of first objective table and second objective table can be mobile to the direction far from another, the matrix of samples
First objective table is fixed in one end and the other end is fixed on second objective table；
At least one described transmission in driver, the driver and first objective table and second objective table connects
It connects.
9. vacuum sound emission nondestructive detection system according to claim 8, which is characterized in that first objective table is equipped with
Dismountable first clamping plate, second objective table are equipped with dismountable second clamping plate, and one end of the matrix of samples is clamped
Between first objective table and the first clamping plate and the other end is clamped in second objective table and second folder
Between plate.
10. vacuum sound emission nondestructive detection system described in any one of -7 according to claim 1, which is characterized in that the examination
Sample matrix includes the first matrix of samples and the second matrix of samples,
First matrix of samples includes: the first fixed section and the second fixed section, and first fixed section and described second are fixed
Section is fixed on the original position stretching machine；First linkage section, first linkage section are connected to first fixed section and described
Between two fixed sections；Wherein, the width of first fixed section is equal with the width of second fixed section and is greater than described the
The width of one linkage section, the thickness of the thickness of first fixed section, the thickness of second fixed section and first linkage section
Degree is equal to each other, and the upper surface of first linkage section is formed with the first spray-coating surface；
Second matrix of samples includes: third fixed section and the 4th fixed section, and the third fixed section and the described 4th fix
Section is fixed on the original position stretching machine；Second linkage section, second linkage section are connected to the third fixed section and described
Between four fixed sections；Wherein, the width of the third fixed section is equal with the width of the 4th fixed section and is greater than described the
The width of two linkage sections, the thickness of the third fixed section is equal with the thickness of the 4th fixed section and is less than second company
The thickness of section is connect, the side surface of second linkage section is formed with the second spray-coating surface.
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