CN108982220A - The evaluation method of the Local Mechanical Property of metal increasing material manufacturing drip molding - Google Patents
The evaluation method of the Local Mechanical Property of metal increasing material manufacturing drip molding Download PDFInfo
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- CN108982220A CN108982220A CN201810929910.6A CN201810929910A CN108982220A CN 108982220 A CN108982220 A CN 108982220A CN 201810929910 A CN201810929910 A CN 201810929910A CN 108982220 A CN108982220 A CN 108982220A
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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Abstract
The evaluation method of the Local Mechanical Property of metal increasing material manufacturing drip molding disclosed by the invention is comprising steps of obtain slight compression sample from key position；Compression test is carried out to obtain the force-displacement curve of slight compression sample to slight compression sample；Amendment force-displacement curve and the load-deformation curve for converting revised force-displacement curve on slight compression sample；With the mechanical property for determining slight compression sample according to load-deformation curve, mechanical property includes elasticity modulus and yield strength.In this way, by from increasing material manufacturing drip molding key position obtain slight compression sample, come characterize metal increasing material manufacturing drip molding key position mechanical property, solve the problems, such as that standard sample can not reflect parts locally performance.The scale of selected slight compression sample had not only had the representativeness of macro-mechanical property, but also can accurately reflect the Micro Zone Mechanical Properties of specified altitude assignment, assigned direction.
Description
Technical field
The present invention relates to the mechanics of materials and the field of test technology, and in particular to a kind of part of metal increasing material manufacturing drip molding
The evaluation method of mechanical property.
Background technique
The increasing material manufacturing (3D printing or rapid prototyping manufacturing) of the relevant technologies is with high energy beam (such as electric arc, laser or electronics
Beam) it is used as heat source, and fast move heat source by the geometrical characteristic of part to melt raw metal (such as silk material or powder
End), to realize successively cumulative forming.However, since metal increasing material manufacturing product experienced fusing many times and solidify
Journey, Source region is smaller, and the thermal history of regional area is more by power of heat source, scanning strategy, component form and size etc.
The influence of kind of factor and become extremely complex, can cause different height, on different directions microstructure significant difference, and it is straight
Connecing leads to the uneven of regional area mechanical property.
Currently, there are mainly two types of the methods of evaluation increasing material manufacturing drip molding mechanical property: one is in the same of manufacture part
When the tensile sample that prints tensile sample, but print can only reflect the mechanical property of sample macroscopic view, it is specific part cannot to be represented
The Local Mechanical Property of height and specific direction.Another method be using focused ion beam (Focused Ion beam,
The methods of FIB), it is cut into the microtrabeculae of nanometer or micron level on material and carries out compression test, but this method is cut
Microtrabeculae sample out usually can generate scale effect because size is too small, also, the result obtained in this way is not
It cannot only reflect the mechanical property of sample macroscopic view, and operate more complicated.
Therefore, how according to the shaping characteristic of increasing material manufacturing carried out under suitable scale test to targetedly,
The mechanical property for accurately evaluating increasing material manufacturing drip molding becomes urgent problem to be solved.
Summary of the invention
Embodiments of the present invention provide a kind of evaluation method of the Local Mechanical Property of metal increasing material manufacturing drip molding.
A kind of evaluation method of the Local Mechanical Property for metal increasing material manufacturing drip molding that embodiments of the present invention provide
Comprising steps of
Determine height and the direction of the key position of the metal increasing material manufacturing drip molding；
Slight compression sample is obtained from the key position；
Compression test is carried out to obtain the force-displacement curve of the slight compression sample to the slight compression sample；
It corrects the force-displacement curve and converts the slight compression sample for the revised force-displacement curve
Load-deformation curve；With
Determine that the mechanical property of the slight compression sample, the mechanical property include according to the load-deformation curve
Elasticity modulus and yield strength.
The evaluation method of the Local Mechanical Property of the metal increasing material manufacturing drip molding of embodiment of the present invention increases for metal
Material manufactures the high localized feature of microstructure and mechanical property of drip molding, by from the crucial position on increasing material manufacturing drip molding
Set the slight compression sample of acquisition, come characterize metal increasing material manufacturing drip molding key position mechanical property, solve standard
Sample can not reflect the problem of parts locally performance.The scale of selected slight compression sample both has macro-mechanical property
Representativeness, and can accurately reflect the Micro Zone Mechanical Properties of specified altitude assignment, assigned direction.
In some embodiments, the slight compression sample is in the form of a column, and the cross section of the slight compression sample is in circle
Shape, the cross section is vertical with the short transverse of the slight compression sample, and the height of the slight compression sample is greater than
0.5mm and it is less than or equal to 3mm, the ratio of the diameter of the height and the cross section of the slight compression sample is 1-3, institute
The area for stating cross section is greater than 0.5mm2And it is less than or equal to 3mm2。
In some embodiments, the slight compression sample is in the form of a column, and the cross section of the slight compression sample is in just
Rectangular, the cross section is vertical with the short transverse of the slight compression sample, and the height of the slight compression sample is greater than
0.5mm and it is less than or equal to 3mm, the ratio of the side length of the height and the cross section of the slight compression sample is 1-3, institute
The area for stating cross section is greater than 0.5mm2And it is less than or equal to 3mm2。
In some embodiments, the load of the compression test is less than or equal to 1000N, the load of the compression test
Loading speed is 0.1 μm/s-3 μm/s.
In some embodiments, the height of the key position of the determination metal increasing material manufacturing drip molding and direction
The step of include:
The model key position of the geometrical model is determined in the geometrical model of the metal increasing material manufacturing drip molding；With
According to the positional relationship of the model key position and the metal increasing material manufacturing drip molding and the geometrical model,
Height and the direction of the key position are determined in the metal increasing material manufacturing drip molding.
In some embodiments, after described the step of obtaining slight compression sample from the key position, the gold
The evaluation method of Local Mechanical Property for belonging to increasing material manufacturing drip molding includes:
The slight compression sample is handled so that described micro- after the slight compression specimen surface is smooth and measurement processing
The size of small compression sample.
In some embodiments, described to correct the force-displacement curve and turn the revised force-displacement curve
The step of turning to the load-deformation curve of the slight compression sample include:
Correct the force-displacement curve, and according to the revised force-displacement curve and described that treated is described micro-
The size of small compression sample determines the load-deformation curve of the slight compression sample.
In some embodiments, the step of amendment force-displacement curve includes:
Obtain the slight compression sample measurement displacement；
The actual displacement of the slight compression sample is determined according to the preset model, the preset model includes the survey
Amount displacement；With
The force-displacement curve is corrected according to the actual displacement.
In some embodiments, the preset model indicates are as follows:
Wherein, dsFor the actual displacement, dfFor measurement displacement, CiFor each portion of testing machine of the compression test
The flexibility of part, F are that the measurement is displaced corresponding pressure value, and the measurement displacement and the pressure value are tried according to the compression
The output signal for the testing machine tested determines.
In some embodiments, the mechanics that the slight compression sample is determined according to the load-deformation curve
The step of elasticity modulus and yield strength of performance includes:
It carries out curve fitting in the elastic stage of the load-deformation curve, to calculate the slight compression sample
Elasticity modulus, and determine that the described of the slight compression sample bends according to the elasticity modulus and the load-deformation curve
Take intensity.
The additional aspect and advantage of embodiments of the present invention will be set forth in part in the description, partially will be from following
Description in become obvious, or the practice of embodiment through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention is from combining in description of the following accompanying drawings to embodiment by change
It obtains obviously and is readily appreciated that, in which:
Fig. 1 is the process of the evaluation method of the Local Mechanical Property of the metal increasing material manufacturing drip molding of embodiment of the present invention
Schematic diagram；
Fig. 2 is the stereoscopic schematic diagram of the metal increasing material manufacturing drip molding of embodiment of the present invention；
Fig. 3 is the floor map of the metal increasing material manufacturing drip molding of embodiment of the present invention；
Fig. 4 is the stereoscopic schematic diagram of the slight compression sample of embodiment of the present invention；
Fig. 5 is the stereoscopic schematic diagram of the slight compression sample of another embodiment of the present invention；
Fig. 6 is the evaluation method of the Local Mechanical Property of the metal increasing material manufacturing drip molding of another embodiment of the present invention
Flow diagram；
Fig. 7 is the evaluation method of the Local Mechanical Property of the metal increasing material manufacturing drip molding of a further embodiment of this invention
Flow diagram.
Main element symbol description:
Metal increasing material manufacturing drip molding 10, slight compression sample 12, plane 14, the height H of key position, cross section S,
Diameter d, the height h of slight compression sample, side length a.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by
The embodiment being described with reference to the drawings is exemplary, and for explaining only the invention, and should not be understood as to limit of the invention
System.
In the description of the present invention, term " first ", " second " are used for description purposes only, and should not be understood as instruction or
It implies relative importance or implicitly indicates the quantity of indicated technical characteristic." first ", " second " are defined as a result,
Feature can explicitly or implicitly include one or more feature.In the description of the present invention, " multiple " contain
Justice is two or more, unless otherwise specifically defined.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected or can be in communication with each other；It can be directly connected, centre can also be passed through
Medium is indirectly connected, and can be the connection inside two elements or the interaction relationship of two elements.For the general of this field
For logical technical staff, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
Following disclosure provides many different embodiments or example is used to realize different structure of the invention.In order to
Simplify disclosure of the invention, hereinafter the component of specific examples and setting are described.Certainly, they are merely examples,
And it is not intended to limit the present invention.In addition, the present invention can in different examples repeat reference numerals and/or reference word
Mother, this repetition are for purposes of simplicity and clarity, itself not indicate discussed various embodiments and/or it is arranged
Between relationship.In addition, the present invention provides various specific techniques and material example, but ordinary skill people
Member is it can be appreciated that the application of other techniques and/or the use of other materials.
Embodiments of the present invention provide a kind of evaluation side of the Local Mechanical Property of metal increasing material manufacturing drip molding 10
Method.
Fig. 1, Fig. 2 and Fig. 3 are please referred to, a kind of metal increasing material manufacturing drip molding 10 that embodiments of the present invention provide
The evaluation method of Local Mechanical Property comprising steps of
S12: height and the direction of the key position of metal increasing material manufacturing drip molding 10 are determined；
S14: slight compression sample 12 is obtained from key position；
S16: compression test is carried out to obtain the force-displacement curve of slight compression sample 12 to slight compression sample 12；
S18: amendment force-displacement curve and the stress-for converting revised force-displacement curve on slight compression sample 12
Strain curve；With
S20: determine that the mechanical property of slight compression sample 12, mechanical property include springform according to load-deformation curve
Amount and yield strength.
The evaluation method of the Local Mechanical Property of the metal increasing material manufacturing drip molding 10 of embodiment of the present invention, for metal
The high localized feature of the microstructure and mechanical property of increasing material manufacturing drip molding 10, by from the pass on increasing material manufacturing drip molding
Key position obtain slight compression sample 12, come characterize metal increasing material manufacturing drip molding 10 key position mechanical property, solution
Standard sample of having determined can not reflect the problem of 10 Local Property of metal increasing material manufacturing drip molding.Selected slight compression sample
12 scale had not only had the representativeness of macro-mechanical property, but also can accurately reflect the microcell mechanical property of specified altitude assignment, assigned direction
Energy.
Specifically, the evaluation method of the Local Mechanical Property of the metal increasing material manufacturing drip molding 10 of embodiment of the present invention is special
Not Shi Yongyu increasing material manufacturing drip molding and mechanical heterogeneity material or component, such as functionally graded material and each to different
Property material etc..
It note that in step S20, it further includes other indexs that mechanical property, which not only includes elasticity modulus and yield strength,
The example of mechanical property is only used as in this elasticity modulus and yield strength rather than is limited.
In step S12 and step S14, in the example of Fig. 2 and Fig. 3, can with increasing material manufacturing (precinct laser fusion) at
The direction of the sample of shape that is, for the length direction of metal increasing material manufacturing drip molding 10, width direction and short transverse, is established
XYZ coordinate system as shown in the figure.
Wherein, the direction of coordinate system X-axis is consistent with the width direction of metal increasing material manufacturing drip molding 10, coordinate system Y-axis
Direction is consistent with the length direction of metal increasing material manufacturing drip molding 10, the direction of coordinate system Z axis and metal increasing material manufacturing drip molding
10 short transverse is consistent.
The cross section of metal increasing material manufacturing drip molding 10 is rectangle, and having a size of 10mm × 25mm, printing height is 50mm.
It specifically, can 16 distance H be with the bottom of metal increasing material manufacturing drip molding 10 from the direction of Z axis in step S14
The plane 14 of 40mm cuts 4 slight compression samples: 12a, 12b, 12c, 12d.
Referring to Fig. 3, the axis of slight compression sample 12a is parallel to Y-axis, the axis of slight compression sample 12b is parallel to
X-axis, the axis of slight compression sample 12c are parallel to Z axis, and the axis of slight compression sample 12d and Y-axis are at 62 ° of angle.
In other words, it is respectively the rectangular of 25mm, 10mm and 50mm that metal increasing material manufacturing drip molding 10, which is length,
Body.This example has determined that four key positions, the height H of first key position are in metal increasing material manufacturing drip molding 10
40mm, direction are to be parallel to Y-axis, cut slight compression sample 12a from first key position；The height of second key position
Degree H is 40mm, and direction is to be parallel to X-axis, cuts slight compression sample 12b from second key position；Third key position
Height H be 40mm, direction be parallel to Z axis, cut slight compression sample 12c from third key position；4th key
The height H of position is 40mm, and direction is to cut slight compression sample from the 4th key position at 62 ° of angle with Y-axis
12d。
Referring to Fig. 4, in some embodiments, slight compression sample 12 is in the form of a column, slight compression sample 12 it is transversal
Face S is rounded, and cross section S is vertical with the short transverse of slight compression sample 12, and the height h of slight compression sample 12 is greater than
0.5mm and it is less than or equal to 3mm, the ratio of the diameter d of the height h and cross section S of slight compression sample 12 is 1-3, cross section
The area of S is greater than 0.5mm2And it is less than or equal to 3mm2。
In other words, the slight compression sample 12 of embodiment of the present invention is cylindrical, the size of slight compression sample 12
Need to meet height h (0.5,3] range, in the range of [1,3], the area of cross section S exists for the ratio of height h and diameter d
(0.5,3] range.
In one example, the height h of slight compression sample 12 is 1mm, the height h and diameter d of slight compression sample 12
Ratio be 1, the area of cross section S is 0.785mm2；In another example, the height h of slight compression sample 12 is 1mm,
The ratio of the height h and diameter d of slight compression sample 12 are 1.2, and the area of cross section S is 0.56mm2；In another example
In, the height h of slight compression sample 12 is 3mm, and the ratio of the height h and diameter d of slight compression sample 12 are 3, cross section S
Area be 0.785mm2。
Referring to Fig. 5, in some embodiments, slight compression sample 12 is in the form of a column, slight compression sample 12 it is transversal
Face S is square, and cross section S is vertical with the short transverse of slight compression sample 12, and the height h of slight compression sample 12 is greater than
0.5mm and it is less than or equal to 3mm, the height h of slight compression sample 12 is less than or equal to 3mm, the height of slight compression sample 12
The ratio of the side length a of h and cross section S is 1-3, and the area of cross section S is greater than 0.5mm2And it is less than or equal to 3mm2.In this way, small pressure
Contracting sample 12 can have macro-mechanical property while accurately reflecting the Micro Zone Mechanical Properties of specified altitude assignment, assigned direction
Representativeness.
In other words, the slight compression sample 12 of embodiment of the present invention is in prism-shaped, and further, the present invention is implemented
The slight compression sample 12 of mode is in cuboid.The size of slight compression sample 12 need to meet height h (0.5,3] model
Enclose, the ratio of height h and side length a [1,3] range, the area of cross section S (0.5,3] range.In an example
In, the height h of slight compression sample 12 is 1mm, and the ratio of the height h and side length a of slight compression sample 12 are 1, cross section S
Area be 1mm2；In another example, the height h of slight compression sample 12 is 1mm, the height h of slight compression sample 12
Ratio with side length a is 1.2, and the area of cross section S is 0.69mm2；In another example, the height of slight compression sample 12
Degree h is 3mm, and the ratio of the height h and side length a of slight compression sample 12 are 3, and the area of cross section S is 1mm2。
Certainly, the cross section S of slight compression sample 12 may be the polygons such as triangle, pentagon or other not
Regular shape, as long as the cross section S of slight compression sample 12 is uniform in the height direction, as long as that is, slight compression sample 12 is in
Right cylinder shape.
In the example of Fig. 2 and Fig. 3,4 slight compression samples 12 are in cylindrical body and size is consistent.Specifically, micro-
The height h of small compression sample 12 is 1mm, and diameter d is 1mm, and the area of cross section S is 0.785mm2, slight compression sample 12
The ratio of height h and diameter d is 2.
In some embodiments, the load of compression test is less than or equal to 1000N, the load loading speed of compression test
For 0.1 μm/s-3 μm/s.In this way, realizing compression test.Specifically, slight compression sample 12 can be placed in mechanical property examination
Machine is tested, is arranged after the parameters such as load and the loading speed of compression test, testing machine is started.Preferably, the load of compression test
Loading speed is 1 μm/s.
In one example, the load of compression test is 1000N, and loading speed is 0.5 μm/s；In another example,
The load of compression test is 800N, and loading speed is 1.5 μm/s；In another example, the load of compression test is 500N,
Loading speed is 1.0 μm/s.
In the example of Fig. 2 and Fig. 3, the pressure head depression distance of testing machine is 0.3mm, loading speed 0.001mm/s,
That is 1 μm/s, maximum, force 100N.
It note that 1000N is determined by equipment, the maximum capacity of equipment is 1000N.Loading speed is depression distance
With the ratio for the time for completing depression distance.For example, when depression distance is 1mm, if the interior completion in 1s, load at this time
Rate is exactly 1mm/s；If completed in 10 seconds, loading speed at this time is 0.1mm/s.In this example, depression distance is
0.3mm, loading speed 0.001mm/s, in other words, the time for completing to push 0.3mm is 300s.
In this way, the force-displacement curve of 4 slight compression samples 12 of testing machine record can be obtained respectively.
Referring to Fig. 6, in some embodiments, step S12 includes:
Step S122: the model key position of geometrical model is determined in the geometrical model of metal increasing material manufacturing drip molding 10
It sets；With
Step S124: according to the positional relationship of model key position and metal increasing material manufacturing drip molding 10 and geometrical model,
Height and the direction of key position are determined in metal increasing material manufacturing drip molding 10.
In this way, can determine metal increasing material manufacturing drip molding 10 by the geometrical model of metal increasing material manufacturing drip molding 10
The height of key position and direction.Specifically, coordinate can be established simultaneously in the geometrical model of metal increasing material manufacturing drip molding 10
The height for determining model key position in geometrical model and the direction in the height and position plane.Note that the coordinate with
Coordinate in the manufacturing process of metal increasing material manufacturing drip molding 10 is overlapped, and metal increasing material manufacturing drip molding 10 and geometrical model
To put orientation consistent.
Referring to Fig. 7, in some embodiments, after step S14, the local force of metal increasing material manufacturing drip molding 10
Learn performance evaluation method include:
Step S15: handling slight compression sample 12 so that micro- after 12 surface of slight compression sample is smooth and measurement processing
The size of small compression sample 12.
In this way, making the measurement of the size of slight compression sample 12 more accurate.It specifically, can be to slight compression
Sample 12 carries out grinding and buffing so that the surface of slight compression sample 12 is smooth and without utilizing metallography microscope after burr
Mirror carries out measurement of taking pictures to slight compression sample 12, then measures the size of slight compression sample 12 again.It note that " micro- herein
The size of small compression sample 12 " refers to diameter d (or the side length a) of the height h and cross section S of slight compression sample.It can manage
Solution, the size after measurement can satisfy the size range of foregoing slight compression sample 12.
In some embodiments, step S18 includes:
Force-displacement curve is corrected, and according to the ruler of revised force-displacement curve and treated slight compression sample 12
The load-deformation curve of very little determining slight compression sample 12.
In this way, making load-deformation curve more accurate.It is appreciated that the force-displacement curve of testing machine record is test
The displacement of the pressure head of machine rather than the actual displacement of slight compression sample 12, so needing to be modified force-displacement curve.
In some embodiments, the step of amendment force-displacement curve includes:
Obtain the measurement displacement of slight compression sample 12；
The actual displacement of slight compression sample 12 is determined according to preset model, preset model includes measurement displacement；With
Force-displacement curve is corrected according to actual displacement.
In this way, realizing the amendment to force-displacement curve.As previously mentioned, the force-displacement curve of testing machine record is not small
The actual displacement of sample 12 is compressed, in other words, the actual displacement of the measurement displacement and slight compression sample 12 of testing machine record
Between there is certain deviations.Therefore, the measurement displacement that testing machine records can be substituted into preset model and is calculated,
To reduce or even eliminate deviation, to obtain the actual displacement of slight compression sample 12, thus according to actual bit in-migration correcting force-
Displacement curve.
In some embodiments, preset model indicates are as follows:
Wherein, dsFor actual displacement, dfFor measurement displacement, CiFor the flexibility of all parts of the testing machine of compression test, F
It is displaced corresponding pressure value for measurement, measurement displacement and pressure value are determined according to the output signal of the testing machine of compression test.
In this way, can realize the amendment to force-displacement curve according to preset model.It is appreciated thatIt is measurement position
Move the deviation between actual displacement.General measure displacement actual displacement between deviation be as caused by testing machine, because
This needs to measure each portion of the testing machines machine such as compression bar, sensor for the actual displacement for obtaining accurate slight compression sample 12
The flexibility of part, and be modified using preset model.In addition, in the example of Fig. 2 and Fig. 3, the flexibility of the testing machine of measurement is
0.00118mm/N。
In some embodiments, step S20 includes:
It carries out curve fitting in the elastic stage of load-deformation curve, to calculate the springform of slight compression sample 12
It measures, and determines the yield strength of slight compression sample 12 according to elasticity modulus and load-deformation curve.
In this way, realizing the elasticity modulus and yield strength for determining the mechanical property of slight compression sample 12.
In the example of Fig. 2 and Fig. 3, mechanical property determined by the load-deformation curve of slight compression sample 12a,
It can reflect the mechanical property of metal increasing material manufacturing drip molding 10 at plane 14 and in the Y-axis direction；
Mechanical property determined by the load-deformation curve of slight compression sample 12b, can reflect metal increasing material manufacturing
The mechanical property of drip molding 10 at plane 14 and in the X-axis direction；
Mechanical property determined by the load-deformation curve of slight compression sample 12c, can reflect metal increasing material manufacturing
The mechanical property of drip molding 10 at plane 14 and in the Z-axis direction；
Mechanical property determined by the load-deformation curve of slight compression sample 12d, can reflect metal increasing material manufacturing
Drip molding 10 at plane 14 and with the mechanical property on direction of the Y-axis at 62 ° of angle.
It should be noted that embodiment of the present invention can only meet above-mentioned one of embodiment or meet simultaneously
State multiple embodiments, that is to say, that the embodiment that said one or multiple embodiments are composed also belongs to the present invention
The protection scope of embodiment.
In the description of this specification, reference term " certain embodiments ", " embodiment ", " some embodiment party
The description of formula ", " exemplary embodiment ", " example ", " specific example " or " some examples " etc. means in conjunction with the implementation
Mode or example particular features, structures, materials, or characteristics described are contained at least one embodiment of the invention or show
In example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or example.And
And particular features, structures, materials, or characteristics described can in any one or more embodiments or example with
Suitable mode combines.
Although embodiments of the present invention have been shown and described above, it is to be understood that above embodiment is
Illustratively, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be right
Above embodiment is changed, modifies, replacement and variant, and the scope of the present invention is defined by the claims and their equivalents.
Claims (10)
1. a kind of evaluation method of the Local Mechanical Property of metal increasing material manufacturing drip molding, which is characterized in that comprising steps of
Determine height and the direction of the key position of the metal increasing material manufacturing drip molding；
Slight compression sample is obtained from the key position；
Compression test is carried out to obtain the force-displacement curve of the slight compression sample to the slight compression sample；
It corrects the force-displacement curve and converts answering for the slight compression sample for the revised force-displacement curve
Force-strain curve；With
Determine that the mechanical property of the slight compression sample, the mechanical property include elasticity according to the load-deformation curve
Modulus and yield strength.
2. the evaluation method of the Local Mechanical Property of metal increasing material manufacturing drip molding as described in claim 1, which is characterized in that
The slight compression sample is in the form of a column, the circular in cross-section of the slight compression sample, the cross section and the small pressure
The short transverse of contracting sample is vertical, and the height of the slight compression sample is greater than 0.5mm and is less than or equal to 3mm, described small
The ratio for compressing the height of sample and the diameter of the cross section is 1-3, and the area of the cross section is greater than 0.5mm2And it is less than
Or it is equal to 3mm2。
3. the evaluation method of the Local Mechanical Property of metal increasing material manufacturing drip molding as described in claim 1, which is characterized in that
The slight compression sample is in the form of a column, and the cross section of the slight compression sample is square, the cross section with it is described small
The short transverse for compressing sample is vertical, and the height of the slight compression sample is greater than 0.5mm and is less than or equal to 3mm, described micro-
The ratio of the side length of the height and cross section of small compression sample is 1-3, and the area of the cross section is greater than 0.5mm2And it is small
In or equal to 3mm2。
4. the evaluation method of the Local Mechanical Property of metal increasing material manufacturing drip molding as described in claim 1, which is characterized in that
The load of the compression test is less than or equal to 1000N, and the load loading speed of the compression test is 0.1 μm/s-3 μm/s.
5. the evaluation method of the Local Mechanical Property of metal increasing material manufacturing drip molding as described in claim 1, which is characterized in that
The step of height of the key position of the determination metal increasing material manufacturing drip molding and direction includes:
The model key position of the geometrical model is determined in the geometrical model of the metal increasing material manufacturing drip molding；
According to the positional relationship of the model key position and the metal increasing material manufacturing drip molding and the geometrical model, in institute
State height and direction that metal increasing material manufacturing drip molding determines the key position.
6. the evaluation method of the Local Mechanical Property of metal increasing material manufacturing drip molding as described in claim 1, which is characterized in that
After described the step of obtaining slight compression sample from the key position, the local mechanical of the metal increasing material manufacturing drip molding
The evaluation method of performance comprising steps of
The slight compression sample is handled so that the small pressure after the slight compression specimen surface is smooth and measurement processing
The size of contracting sample.
7. the evaluation method of the Local Mechanical Property of metal increasing material manufacturing drip molding as claimed in claim 6, which is characterized in that
It is described to correct the force-displacement curve and convert answering for the slight compression sample for the revised force-displacement curve
The step of force-strain curve includes:
Correct the force-displacement curve, and according to the revised force-displacement curve and treated the small pressure
The size of contracting sample determines the load-deformation curve of the slight compression sample.
8. the evaluation method of the Local Mechanical Property of metal increasing material manufacturing drip molding as described in claim 1, which is characterized in that
The step of amendment force-displacement curve comprising steps of
Obtain the measurement displacement of the slight compression sample；
The actual displacement of the slight compression sample is determined according to preset model, the preset model includes the measurement displacement；
With
The force-displacement curve is corrected according to the actual displacement.
9. the evaluation method of the Local Mechanical Property of metal increasing material manufacturing drip molding as claimed in claim 8, which is characterized in that
The preset model indicates are as follows:
Wherein, dsFor the actual displacement, dfFor measurement displacement, CiFor the testing machine all parts of the compression test
Flexibility, F are that the measurement is displaced corresponding pressure value, the measurement displacement and the pressure value according to the examination of the compression test
The output signal for testing machine determines.
10. the evaluation method of the Local Mechanical Property of metal increasing material manufacturing drip molding as described in claim 1, feature exist
In the elasticity modulus of the mechanical property for determining the slight compression sample according to the load-deformation curve and surrender are strong
The step of spending include:
It carries out curve fitting in the elastic stage of the load-deformation curve, to calculate the elasticity of the slight compression sample
Modulus, and determine according to the elasticity modulus and the load-deformation curve yield strength of the slight compression sample.
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