CN108333201A - A kind of in situ neutron diffraction stress and textural composite test method - Google Patents
A kind of in situ neutron diffraction stress and textural composite test method Download PDFInfo
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- CN108333201A CN108333201A CN201710701324.1A CN201710701324A CN108333201A CN 108333201 A CN108333201 A CN 108333201A CN 201710701324 A CN201710701324 A CN 201710701324A CN 108333201 A CN108333201 A CN 108333201A
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- 238000011065 in-situ storage Methods 0.000 title claims abstract description 86
- 238000001683 neutron diffraction Methods 0.000 title claims abstract description 55
- 239000002131 composite material Substances 0.000 title claims abstract description 24
- 238000010998 test method Methods 0.000 title claims abstract description 22
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- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
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- G01N23/20008—Constructional details of analysers, e.g. characterised by X-ray source, detector or optical system; Accessories therefor; Preparing specimens therefor
- G01N23/20025—Sample holders or supports therefor
- G01N23/20033—Sample holders or supports therefor provided with temperature control or heating means
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- 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
- G01N3/18—Performing tests at high or low temperatures
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- 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
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- G01N2223/05—Investigating materials by wave or particle radiation by diffraction, scatter or reflection
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Abstract
The in situ neutron diffraction stress and textural composite test method of the present invention, turntable and total powerstation positioning system are adjusted using in situ environment loading device, three-dimensional coordinate, realize test specimen be accurately positioned and in-situ test in vert function, power load, the Combined Loading in temperature field, and the acquisition of in situ neutron diffraction spectrum is completed using neutron stress spectrometer.First, test specimen positioning adjusts three-dimensional translating and the rotation of turntable, the accurate aligned condition for adjusting test specimen and neutron beam spot by three-dimensional coordinate using the alignment of neutron beam focus, double total powerstation visual field intersection points and test specimen tested point as foundation.Secondly, it is realized under 0 ~ 50 kN stretching/compressings of test specimen using in situ environment loading device, the continuous alternating temperature of room temperature to 1000 oC, 0 ~ 90 ° of inclination and 360 ° of rotations.Finally, the acquisition of in situ neutron diffraction spectrum is completed by neutron stress spectrometer.The test method of the present invention, suitable for crystalline material or mini engineering component, power heat is verted composite test or the detection of the lower neutron stress of load and texture in situ.
Description
Technical field
The invention belongs to material micro mechanical property test technical fields, and in particular to a kind of in situ neutron diffraction stress and
Textural composite test method.
Background technology
Have benefited from neutron has powerful penetration capacity to most of materials, and neutron diffraction is that currently the only one kind can nothing
Damage, the laboratory facilities for obtaining to depth material internal crystal structure information.During development is formed on neutron diffraction basis
Sub- stress and texture measurement method can the information such as lossless acquisition sample interior three-dimensional Stress Distribution and crystal orientation distribution, such knot
Fruit to understand material Deformation Mechanism, phase change characteristics and intergranular stress develop etc. behaviors have decisive significance.Also, neutron spreads out
Shooter's section forms complementation with for material surface stress and the Traditional x-ray diffraction of texture measurement, electron backscatter diffraction means,
In the great application value of materialogy research field.It is sample that in situ neutron diffraction stress and texture test, which are on the basis of routine experiment,
Product increase in situ environment condition.With routine experiment（Or experiment of offing normal）It compares, experiment in situ provides for sample closer to real
The condition of border usage environment, and contribute to the direct observation of material new physics phenomenon under high strength at high temperature load, it is a kind of advanced
Neutron experiments means.In principle, neutron diffraction stress test utilizes Prague by the offset of measurement feature crystallographic plane diffraction peak
Formula counting lattice strains, and obtains stress value by generalized Hooke law.Three-dimensional rotation by sample relative to diffraction vector,
The measurement for carrying out different directions can parse the three-dimensional lattice strain information for obtaining sample.And the test of neutron diffraction texture then passes through
It measures and specifies crystallographic plane diffraction peak intensity in the distribution of orientations of sample space, obtain the pole figure of the crystal face.Pass through different crystal face pole figures
Measurement, parsing reconstruct the Texture Informations such as orientation distribution function, the inverse pole figure of sample.Experiment in situ is test specimen on this basis
Provide Mechanical loading, high temperature, inclination and rotation function.When in-situ stress is tested, in target temperature and specified diffraction vector side
Downwards, neutron diffraction when being loaded by measuring different power/displacement is composed, and the microstress-in test specimen each stretching/compressing stage is obtained
Strain-responsive.In texture experiment in situ, is matched with spinning motion by tilting, obtain crystal under test specimen Li-hot loading environment
It is orientated the rule to develop.
Although damaging stress test and X-ray skin stress and texture measurement technology relative to boring method, ring core method etc.
For, neutron diffraction techniques have its property of can not be substituted, and experiment in situ is more conducive to lossless on-line water flushing sample structure evolution letter
Breath, but its technology realizes that threshold is high, difficulty is big.Diffraction is typically based on the large scientific facilities such as reactor or accelerator with neutron source,
Special neutron diffraction stress spectrometer need to be had by carrying out stress or texture test, and it need to be then that corresponding spectrometer is equipped with specially again that original position, which is tested,
The environment loading device of optimization design, therefore domestic related field still belongs to blank.On the other hand, neutron in situ is answered in the world at present
Power and neutron texture in situ measure be carried out separately, in-situ stress measures the not integrated test specimen of stretcher used and verts work(
Can, it can not flexibly choose stress test direction；Euler's ring that texture measurement in situ uses cannot take into account the power heat load of test specimen, nothing
The evolution-information that texture is orientated when method obtains test specimen stretching/compressing, temperature field loads simultaneously.The two equipment, functionally mutually
Independent, sample forces-heat-is inclined-turn four degree of freedom in situ can not direct-coupling.Test method of the present invention is based on China
The neutron diffraction stress analysis that large-scale neutron science platform " Chinese Mianyang research reactor " phase for first normalization operation is built up
Spectrometer, the special in situ environment loading device of stress spectrometer researched and developed using autonomous Design coordinate three-dimensional sample turntable and whole station
Instrument positioning system, realize in situ neutron diffraction stress and textural composite test needed for test specimen submillimeter level be accurately positioned, power-
Hot-inclining-turns the load of four-degree-of-freedom in situ environment condition, and completes adopting in situ neutron diffraction spectrum by neutron stress spectrometer
Collection.The blending two kinds of neutron stress in situ, texture experimental methods of the invention, realizes test specimen Li-heat-is inclined-and turns
Two kinds of test functions of Combined Loading and neutron stress and texture in situ of four degree of freedom in situ integrate, this still belongs at home
For the first time.
Invention content
The present invention provides a kind of in situ neutron diffraction stress and textural composite test method, by neutron stress in situ and
Two kinds of experimental methods of texture blend, and realize Combined Loading and original position that test specimen Li-heat-is inclined-turns four degree of freedom in situ
Neutron stress, two kinds of test functions of texture it is integrated.Pass through in situ environment loading device, neutron stress spectrometer sample stage and whole station
Instrument positioning system is used cooperatively, and the development to test in situ provides comprehensive solution.
The in situ neutron diffraction stress and textural composite test method of the present invention, its main feature is that, it neutron stress in situ and knits
The experimental provision of structure composite test includes in situ environment loading device, three-dimensional coordinate adjusting turntable, the first total powerstation and second
Total powerstation, wherein in situ environment loading device adjust the XY table top phases of turntable by the dowel hole on bottom plate with three-dimensional coordinate
Even, three-dimensional coordinate adjusts turntable, the first total powerstation and the second total powerstation three according to angular position relational layout, test method
Include the following steps：
A. total powerstation positions
Each total powerstation is adjusted to level by total powerstation supporting table, is adjusted total powerstation height using elevating lever, is made complete by first
The neutron beam height identification that instrument and the second total powerstation are observed of standing is respectively positioned on visual field center focal point, is revolved by total powerstation level
Turn, make XY table tops center identification while on the two vertical datum lines of total powerstation visual field, then adjusting the two total powerstation elevations angle to zero；
B. preparation of samples
Test specimen two ends to be measured are clamped by piece fixture and are mounted on in situ environment loading device；
C. Sample location
Test specimen inclination angle is adjusted to zero by Sloped rotating guide rail, and adjustment three-dimensional coordinate adjusts turntable height, makes by first
The test specimen that total powerstation is observed is overlapped with horizontal datum, then adjust test specimen inclination angle to 90 °, by change XY table tops X,
Y coordinate makes test specimen be overlapped simultaneously with vertical datum line in the visual field of two total powerstations；
D. the angle of diffraction walks
According to the selection of test specimen crystal face to be measured, incident neutron beam and diffracted neutrons beam angle to specified Bragg diffraction angle are adjusted,
Rotation of the turntable around the axis of rotation is adjusted by three-dimensional coordinate, the test specimen axis of rotation is made to be located at the dividing equally on face of angle of diffraction supplementary angle；
E. in situ environment condition loads
Test specimen Mechanical loading is by power loading motor by driving leading screw that piece fixture is driven to generate translation realization, test specimen engineering stress
It is measured in real time by tension-compression sensor, test specimen engineering strain is read by Video Extensometer, and test specimen is heated by load coil, and is led to
It crosses thermocouple and carries out contact temperature-measuring, the inclination of test specimen and spinning motion by AC Servo Motor Control and calculate respective corners
Degree；
F. neutron diffraction spectrum acquisition
According to experiment demand nominative testing environmental condition, and judge whether meet test request through the realized in-situ conditions of step e,
As meet if acquire by neutron diffraction stress analysis spectrometer and preserve neutron diffraction spectrum, then select change condition continue test or
Terminate experiment, otherwise repeatedly step e, step f terminate until testing.
In step d, the test specimen axis of rotation is placed in the angle of diffraction and is mended in equidistant point, can make diffraction vector 0 ° of test specimen ~
Entire sample space is traversed in 90 ° of inclinations and 360 ° of spinning motions, to realize that complete texture pole measures and test specimen is arbitrarily square
To stress test.
Load coil used in step e ensures to survey in the middle part of test specimen using the positive connection connection of symmetrical double coils in series
It is unobstructed to measure region neutron light path.
In step f, when neutron stress measurement in situ, inclination angle, angle of rotation and the temperature of test specimen are fixed, in different power or
Neutron diffraction spectrum is acquired under displacement, neutron texture in situ measures power, displacement and the temperature for then fixing test specimen, with inclination angle and rotation
Angle is that variable scans neutron diffraction spectrum.
The in situ neutron diffraction stress and textural composite test method of the present invention, uses in situ environment loading device, three-dimensional
Coordinate adjusts turntable and total powerstation positioning system, realize test specimen be accurately positioned and in-situ test in vert function, power carry
Lotus, temperature field Combined Loading, and using neutron stress spectrometer complete in situ neutron diffraction spectrum acquisition.It is carried out first when test
Sample is accurately positioned, and using the alignment of neutron beam focus, double total powerstation visual field intersection points and test specimen tested point as basis on location, is led to
Cross three-dimensional coordinate adjust turntable three-dimensional translating and 360 ° of rotations, the accurate alignment for adjusting test specimen and neutron beam spot.With
Afterwards, using in situ environment loading device, to being arbitrarily designated within 50 kN of test specimen progress, stretching/compressing loads and room temperature arrives
The continuous alternating temperature of 1000 oC, 0 ~ 90 ° of inclination and 360 ° of rotations.Finally, it after environmental condition to be tested is stablized, is answered by neutron diffraction
Power analyzer completes the acquisition of in situ neutron diffraction spectrum.
The in situ neutron diffraction stress and textural composite test method of the present invention, incline in Li-heat-suitable for crystalline material-
Under the Combined Loading for turning four degree of freedom in situ, it is arbitrarily designated neutron stress measurement or the texture pole test in direction, it is also possible to
It is detected in the neutron stress and textural composite in situ of mini engineering component.
Description of the drawings
Fig. 1 is that the in situ neutron diffraction stress of the present invention and positioning device, the in situ environment of textural composite test method add
Carry the layout relationship schematic diagram set with neutron streaming；
Fig. 2 is the in situ neutron diffraction stress of the present invention and the test flow chart of textural composite test method；
Fig. 3 is that three-dimensional coordinate adjusts turntable XY table tops and its center identification schematic diagram；
Fig. 4 is datum line and the schematic diagram of focus mark in total powerstation visual field；
Fig. 5 is the diffraction geometric representation at specified Bragg diffraction angle；
In figure, 1. bottom plate, 2. dowel hole, 3. in situ environment loading device, 4. Sloped rotating guide rail, 5. Mechanical loading holder
6. power loading motor 7. drives 10. rotation support component of leading screw 8. tension-compression sensor, the 9. test specimen axis of rotation, 11. specimen holder
12. 15. Video Extensometer fixed platform of test specimen 13. load coil, 14. Video Extensometer, 16. Video Extensometer triangle
17. Video Extensometer A-frame firm banking 18.XY table top 19.X coordinate adjusting screw 20.X coordinates of holder adjust electricity
Machine 21.X coordinates adjust sliding slot 22.Y coordinate adjusting screw 23.Y coordinate regulation motor 24.Y coordinates and adjust 25. three-dimensional of sliding slot
Coordinate adjusts 26. axis of rotation of turntable, 27. 28. first total powerstation of neutron beam height identification, 29. elevating lever, 30. total powerstation
31. total powerstation A-frame of supporting table, 32. 33. thermocouple of total powerstation A-frame firm banking, 34. incident neutron beam
35. 38. horizontal datum of diffracted neutrons beam 37. second total powerstation of 36.XY table tops center identification, 39. vertical datum line 40.
41. Bragg diffraction angle of focus, 42. diffraction vector.
Specific implementation mode
The present invention is described in further details below in conjunction with the accompanying drawings.
Fig. 1 is that the in situ neutron diffraction stress of the present invention and positioning device, the in situ environment of textural composite test method add
It carries and sets and the layout relationship schematic diagram of neutron streaming, hardware composition includes that in situ environment loading device, three-dimensional coordinate are adjusted and revolved
Turntable and total powerstation positioning system three parts specifically include bottom plate 1, dowel hole 2, in situ environment loading device 3, tilt rotation
Transduction rail 4, Mechanical loading holder 5, power loading motor 6, driving leading screw 7, tension-compression sensor 8, the test specimen axis of rotation 9, rotation support
Component 10, specimen holder 11, load coil 13, Video Extensometer 14, Video Extensometer fixed platform 15, Video Extensometer
A-frame 16, Video Extensometer A-frame firm banking 17, XY table tops 18, X-coordinate adjusting screw 19, X-coordinate adjust electricity
Machine 20, X-coordinate adjust sliding slot 21, Y coordinate adjusting screw 22, Y coordinate regulation motor 23, Y coordinate and adjust sliding slot 24, three-dimensional coordinate
Adjust turntable 25, neutron beam height identification 27, the first total powerstation 28, elevating lever 29, total powerstation supporting table 30, total powerstation triangle
Holder 31, total powerstation A-frame firm banking 32, thermocouple 33, incident neutron beam 34, diffracted neutrons beam 35, the second total powerstation
37。
Fig. 2 is the in situ neutron diffraction stress of the present invention and the test flow chart of textural composite test method, including sample
It is accurately positioned, in situ environment condition loads, neutron diffraction spectrum acquisition three parts.
Fig. 3 is that three-dimensional coordinate adjusts turntable XY table tops 18 and XY table tops center identification 36.
Fig. 4 is the positioning tag line in total powerstation visual field, specifically includes horizontal datum 38, vertical datum line 39 and focus
40。
Fig. 5 is the diffraction geometric representation at specified Bragg diffraction angle, specifically includes incident neutron beam 34, diffracted neutrons beam
35, Bragg diffraction angle 41 and diffraction vector 42.
The in situ neutron diffraction stress of the present invention and the concrete operation step of textural composite test method are as follows：
（1）Total powerstation positions
Three-dimensional coordinate is adjusted into turntable 25, the first total powerstation 28,37 three of the second total powerstation according to angular position shown in FIG. 1
Relationship arranges, and adjusts total powerstation to horizontality by total powerstation supporting table 30, the height of total powerstation is adjusted using elevating lever 29,
The neutron beam height identification 27 observed by the first total powerstation 28 and the second total powerstation 37 is set to be respectively positioned on visual field center focus 40
Place, is rotated horizontally by total powerstation, and XY table tops center identification 36 is made to be located on the vertical datum line of two total powerstation visual fields 39 simultaneously, with
After to adjust the two total powerstation elevations angle be zero.At this point, the focus of two total powerstation sights is neutron beam spot position.
（2）Preparation of samples
12 both ends of test specimen to be measured are clamped by piece fixture 11, and integral installation is in situ on environment loading device 3.Test specimen presss from both sides
Tool 11 is according to experiment type（Stretching/compressing is tested）It can be customized adjustment with the difference of test specimen diameter.
（3）Sample location
In situ environment loading device 3 adjusts 18 phase of XY table tops of turntable 25 by the dowel hole 2 on bottom plate 1 with three-dimensional coordinate
Even, ensure that the two moves synchronously with this.The inclination angle for adjusting test specimen 12 by Sloped rotating guide rail 4 then adjusts three-dimensional to 0 °
Coordinate adjusts the height of turntable 25, makes 12 center line of test specimen observed by the first total powerstation 28 and 38 weight of horizontal datum
It closes.Next, adjusting 12 inclination angle of test specimen to 90 °, by changing the X, Y coordinates of XY table tops 18,12 center line of test specimen is made to exist simultaneously
It is overlapped with vertical datum line 39 in the visual field of two total powerstations.At this point, test specimen 12 tilts, the center location and neutron of spinning motion
Beam spot position overlaps.
（4）The angle of diffraction walks
According to test specimen 12 it is to be measured (hkl) crystal face selection, adjust the angle of incident neutron beam 34 and diffracted neutrons beam 35 to specified
Bragg diffraction angle 41, wherein Bragg diffraction angle 41 determine according to Bragg equation, i.e.,
（1）
Formula（1）In,d hkl For it is to be measured (hkl) crystal face interplanar distance,θ hkl For (hkl) crystal face Bragg angle,nFor interference leveln =1,2,3 ...,λFor the wavelength of monochromatic neutron beam.Take interference leveln =1,2θ hkl The angle of diffraction shown in as Fig. 5
41.Then, turntable 25 is adjusted around the rotation of the axis of rotation 26 by three-dimensional coordinate, the test specimen axis of rotation 9 is made to be located at angle of diffraction supplementary angle
Divide equally on face.At this point, diffraction vector 42 can be made to traverse entire sample in 0 ° ~ 90 ° inclinations of test specimen 12 and 360 ° of spinning motions
Product space, to realize that complete texture pole measures and test specimen any direction stress test.
（5）In situ environment condition loads
12 Mechanical loading of test specimen is by power loading motor 6 by driving leading screw 7 that piece fixture 11 is driven to generate translation realization, test specimen 12
Engineering stress is measured in real time by tension-compression sensor 8, and 12 engineering strain of test specimen read by Video Extensometer 14, true stress, true
Strain by（2）、（3）Two formulas obtain
（2）
（3）
Wherein,σ T、ε T、σ E、ε ERespectively true stress, logarithmic strain, engineering stress and engineering strain.
Test specimen 12 is heated by load coil 13.To ensure that 12 middle part measured zone neutron light path of test specimen is unobstructed, sense
Answer heating coil 13 using the positive connection connection of symmetrical double coils in series, as shown in fig. 1.12 temperature of test specimenTBy thermocouple 33 into
Row contact type measurement.The inclination angle of test specimen 12χAnd angle of rotationφBy AC Servo Motor Control and read.
（6）Neutron diffraction spectrum acquisition
Experiment type is confirmed according to demand, is such as carried out neutron stress measurement in situ, is then fixed the inclination angle of test specimen 12χ, angle of rotationφAnd temperatureT, in different loading forcesσ EOr engineering strainε ELower acquisition neutron diffraction spectrum, 12 assigned direction of test specimen (hkl) brilliant
The microstrain in faceε hkl It can be given by
（4）
Wherein,d hkl 、d hkl,0 、θ hkl 、θ hkl,0 Respectively (hkl) interplanar distance of crystal face, unstress state interplanar distance, neutron
Diffraction peak, unstress state neutron diffraction peak position.Neutron diffraction peak position herein is by obtaining the fitting of neutron diffraction spectra.
Neutron texture measurement in situ is such as carried out, then fixes the temperature of test specimen 12T, dependent variableε EOr loading forceσ E, with inclination angleχAnd angle of rotationφBe combined as variable carry out neutron diffraction spectrum scanning.Inclination angleχAnd angle of rotationφSelection so that diffraction swear
When opposite test specimen 12 moves, can cover entire sample space is advisable amount 42（Such asχ=5 °,φ= 0, 5, 10,…, 355°；χ
=15 °,φ= 0, 5, 10,…, 355°；…；χ=85 °,φ= 0, 5, 10,…, 355°）.Test specimen 12 (hkl) brilliant
Face in situ condition (T, ε E, σ E) under pole density fonctionp hkl (α, β) be given by
（5）
Wherein,α、βRespectively inclination angle and angle of rotation of the density direction in pole relative to sample coordinate system has in the methodα =χ,β = φ。I hkl (α, β) be test specimen 12 (α, β) on direction (hkl) crystallographic plane diffraction peak integrated intensity, Δα、ΔβRespectively
For the step-length at inclination angle and angle of rotation.
Before test, according to the specified environmental condition of experiment demand, judge through step（5）Whether realized in-situ condition meets
Test request.If met, is then acquired by above-mentioned steps and preserve neutron diffraction spectrum, change condition is then selected to continue to test or tie
Beam is tested；Otherwise, step is repeated（5）, step（6）Until experiment terminates.
Above-mentioned steps are specific implementation process of the invention in Fig. 2 flow charts.
To sum up, in situ neutron diffraction stress through the invention and textural composite test method realize material grade test specimen
Or the submillimeter level sample needed for mini engineering component progress experiment in situ is accurately positioned, it is compound to turn four-degree-of-freedom by Li-heat-is inclined-
In-situ condition loads, and has been finally completed in situ neutron diffraction stress and textural composite detection.
Claims (4)
1. a kind of in situ neutron diffraction stress and textural composite test method, which is characterized in that in situ neutron diffraction stress and knit
The experimental provision of structure composite test includes in situ environment loading device（3）, three-dimensional coordinate adjust turntable（25）, the first total powerstation
（28）With the second total powerstation（37）, wherein in situ environment loading device（3）Pass through bottom plate（1）On dowel hole（2）With three-dimensional
Coordinate adjusts turntable（25）XY table tops（18）It is connected, three-dimensional coordinate adjusts turntable（25）, the first total powerstation（28）With
Two total powerstations（37）Three includes the following steps according to angular position relational layout, test method：
A. total powerstation positions
Pass through total powerstation supporting table（30）Each total powerstation is adjusted to level, utilizes elevating lever（29）Total powerstation height is adjusted, makes to lead to
Cross the first total powerstation（28）With the second total powerstation（37）The neutron beam height identification observed（27）It is respectively positioned on visual field center focus
（40）Place, is rotated horizontally by total powerstation, makes XY table top center identifications（36）It is located at the two vertical datum lines of total powerstation visual field simultaneously
（39）On, the two total powerstation elevations angle are then adjusted to zero；
B. preparation of samples
Test specimen to be measured（12）Both ends pass through piece fixture（11）It is clamped and is mounted in situ environment loading device（3）On；
C. Sample location
Pass through Sloped rotating guide rail（4）Adjust test specimen（12）To zero, adjustment three-dimensional coordinate adjusts turntable at inclination angle（25）Highly,
Make through the first total powerstation（28）The test specimen observed（12）With horizontal datum（38）It overlaps, then adjusts test specimen（12）It tilts
Angle is to 90 °, by changing XY table tops（18）X, Y coordinates, make test specimen（12）Simultaneously in the visual field of two total powerstations with vertical base
Directrix（39）It overlaps；
D. the angle of diffraction walks
According to test specimen（12）The selection of crystal face to be measured adjusts incident neutron beam（34）With diffracted neutrons beam（35）Angle is to specified cloth
The glug angle of diffraction（41）, turntable is adjusted by three-dimensional coordinate（25）Around the axis of rotation（26）Rotation, make the test specimen axis of rotation（9）Position
Dividing equally on face for angle of diffraction supplementary angle；
E. in situ environment condition loads
Test specimen（12）Mechanical loading is by power loading motor（6）By driving leading screw（7）Drive piece fixture（11）It is real to generate translation
It is existing, test specimen（12）Engineering stress is by tension-compression sensor（8）It measures in real time, test specimen（12）Engineering strain is by Video Extensometer（14）It reads
It takes, test specimen（12）By load coil（13）Heating, and pass through thermocouple（33）Carry out contact temperature-measuring, test specimen（12）Incline
Tiltedly and spinning motion by AC Servo Motor Control and calculates respective angles；
F. neutron diffraction spectrum acquisition
According to experiment demand nominative testing environmental condition, and judge whether meet test request through the realized in-situ conditions of step e,
As meet if acquire by neutron diffraction stress analysis spectrometer and preserve neutron diffraction spectrum, then select change condition continue test or
Terminate experiment, otherwise repeatedly step e, step f terminate until testing.
2. in situ neutron diffraction stress according to claim 1 and textural composite test method, which is characterized in that in step
In d, by the test specimen axis of rotation（9）It is placed in the angle of diffraction to mend in equidistant point, diffraction vector can be made（42）In test specimen（12）0°~90°
Entire sample space is traversed in inclination and 360 ° of spinning motions, to realize that complete texture pole measures and test specimen any direction is answered
Power is tested.
3. in situ neutron diffraction stress according to claim 1 and textural composite test method, which is characterized in that step e
Used in load coil（13）Using the positive connection connection of symmetrical double coils in series, ensure test specimen（12）Middle part measured zone
Neutron light path is unobstructed.
4. in situ neutron diffraction stress according to claim 1 and textural composite test method, which is characterized in that in step
In f, when neutron stress measurement in situ, test specimen（12）Inclination angle, angle of rotation and temperature fix, acquired under different power or displacement
Neutron diffraction is composed, and neutron texture in situ, which measures, then fixes test specimen（12）Power, displacement and temperature, be to become with inclination angle and angle of rotation
Amount scanning neutron diffraction spectrum.
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