CN108333201B - In-situ neutron diffraction stress and texture composite test method - Google Patents
In-situ neutron diffraction stress and texture composite test method Download PDFInfo
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Abstract
The in-situ neutron diffraction stress and texture composite test method provided by the invention uses an in-situ environment loading device, a three-dimensional coordinate adjusting rotary table and a total station positioning system, realizes accurate positioning of a test piece and composite loading of a tilting function, a force load and a temperature field in-situ test, and completes acquisition of an in-situ neutron diffraction spectrum by using a neutron stress spectrometer. Firstly, the alignment state of a test piece and a neutron beam spot is accurately adjusted by adjusting the three-dimensional translation and rotation of a rotating table through three-dimensional coordinates according to the alignment state of a neutron beam focus, a view field intersection point of a double full station instrument and a test piece point to be measured. Secondly, the in-situ environment loading device is used for realizing continuous temperature change of the test piece from room temperature to 1000 ℃, inclination of 0-90 degrees and rotation of 360 degrees under the condition of stretching/compressing of 0-50 kN. And finally, completing the acquisition of an in-situ neutron diffraction spectrum by a neutron stress spectrometer. The testing method is suitable for the composite test or detection of the neutron stress and the texture of the crystal material or the small engineering component under the in-situ force thermal tilting loading.
Description
Technical Field
The invention belongs to the technical field of material micromechanics performance testing, and particularly relates to an in-situ neutron diffraction stress and texture composite testing method.
Background
Because of the strong penetration ability of neutrons to most materials, neutron diffraction is the only experimental means that can obtain the crystal structure information in the materials in a lossless and deep manner at present. The neutron stress and texture measuring method developed and formed on the basis of the neutron diffraction principle can nondestructively obtain information such as three-dimensional stress distribution and crystal orientation distribution in a sample, and the result has decisive significance for understanding behaviors such as deformation mechanism, phase change characteristics and intercrystalline stress evolution of the material. Moreover, the neutron diffraction means is complementary with the traditional X-ray diffraction and electron back scattering diffraction means aiming at the measurement of the surface stress and the texture of the material, and has great application value in the research field of materials science. In-situ neutron diffraction stress and texture testing is to add in-situ environmental conditions to the sample based on routine experimentation. Compared with the conventional experiment (or off-site experiment), the in-situ experiment provides the condition which is closer to the actual working environment for the sample, is beneficial to the direct observation of the new physical phenomenon of the material under high temperature and high load, and is an advanced neutron experiment means. In principle, neutron diffraction stress test is carried out by measuring the shift of the diffraction peak of the characteristic crystal face, calculating the lattice strain by using a Bragg formula and obtaining the stress value by using the generalized Hooke's law. Through three-dimensional rotation of the sample relative to the diffraction vector, measurement in different directions is carried out, and three-dimensional lattice strain information of the sample can be obtained through analysis. And the neutron diffraction texture test obtains a polar diagram of the specified crystal face by measuring the orientation distribution of the diffraction peak intensity of the crystal face in a sample space. And analyzing and reconstructing texture information such as an orientation distribution function, an inverse pole figure and the like of the sample through measurement of different crystal plane pole figures. The in-situ experiment provides mechanical loading, high temperature, inclination and autorotation functions for the test piece on the basis. In the in-situ stress experiment, the microscopic stress-strain response of each tensile/compression stage of the test piece is obtained by measuring neutron diffraction spectra during different force/displacement loads under the target temperature and the designated diffraction vector direction. In the in-situ texture experiment, the law of crystal orientation evolution under the condition of specimen force-heat loading is obtained by matching the inclined motion and the autorotation motion.
Although the neutron diffraction technology has no substitutability for the destructive stress tests such as a drilling method, a ring core method and the like and the X-ray surface stress and texture measurement technology, and the in-situ experiment is more beneficial to nondestructive online detection of the structural evolution information of the sample, the realization threshold of the technology is high and the difficulty is high. The neutron source for diffraction is usually based on a reactor or an accelerator and other large scientific devices, a special neutron diffraction stress spectrometer is needed for stress or texture test, and an environment loading device specially optimized for the corresponding spectrometer is needed for in-situ experiments, so that related fields in China still belong to a blank. On the other hand, currently, in-situ neutron stress and in-situ neutron texture measurement are carried out separately internationally, and stretching equipment used for in-situ stress measurement does not integrate the tilting function of a test piece and cannot flexibly select a stress test direction; the Europe pull ring used for in-situ texture measurement can not give consideration to the force and heat loading of a test piece, and can not obtain the evolution information of texture orientation when the test piece is stretched/compressed and a temperature field is loaded simultaneously. The two devices are mutually independent in function, and four in-situ degrees of freedom of sample force-heat-inclination-rotation cannot be directly coupled. The testing method is based on a neutron diffraction stress analysis spectrometer built in the first normally-operated large-scale neutron science platform 'China Mianyang research heap' stage in China, utilizes an in-situ environment loading device special for the stress spectrometer which is independently designed and researched, and is matched with a three-dimensional sample rotating table and a total station positioning system, realizes the sub-millimeter-grade accurate positioning and force-heat-tilt-to-four-degree-of-freedom in-situ environment condition loading of a test piece required by in-situ neutron diffraction stress and texture composite testing, and completes the acquisition of the in-situ neutron diffraction spectrum by the neutron stress spectrometer. The invention creatively combines two experimental methods of in-situ neutron stress and texture, realizes the composite loading of four in-situ degrees of freedom of force, heat, inclination and rotation of a test piece and the integration of two test functions of in-situ neutron stress and texture, and is the first time in China.
Disclosure of Invention
The invention provides an in-situ neutron diffraction stress and texture composite test method, which integrates two experimental methods of in-situ neutron stress and texture to realize the composite loading of four in-situ degrees of freedom of test piece force-heat-inclination-rotation and the integration of two test functions of in-situ neutron stress and texture. Through the cooperation of the in-situ environment loading device, the neutron stress spectrometer sample stage and the total station positioning system, a comprehensive solution is provided for the development of in-situ experiments.
The invention discloses an in-situ neutron diffraction stress and texture composite testing method, which is characterized in that an experimental device for in-situ neutron stress and texture composite testing comprises an in-situ environment loading device, a three-dimensional coordinate adjusting rotary table, a first total station and a second total station, wherein the in-situ environment loading device is connected with an XY table surface of the three-dimensional coordinate adjusting rotary table through a positioning pin hole in a bottom plate, the three-dimensional coordinate adjusting rotary table, the first total station and the second total station are distributed according to a triangular position relation, and the testing method comprises the following steps:
a. total station positioning
Adjusting each total station to be horizontal through a total station supporting table, adjusting the height of the total station by using a lifting rod, enabling neutron beam height marks observed through a first total station and a second total station to be located at a central focus of a view field, enabling an XY table top center mark to be located on vertical reference lines of the view fields of the two total stations at the same time through horizontal rotation of the total stations, and then adjusting the elevation angles of the two total stations to be zero;
b. sample preparation
Two ends of a to-be-tested piece are clamped by a test piece clamp and are arranged on the in-situ environment loading device;
c. sample positioning
Adjusting the inclination angle of the test piece to zero through the inclined rotating guide rail, adjusting the height of the three-dimensional coordinate adjusting rotating platform to enable the test piece observed through the first total station to be coincident with the horizontal datum line, then adjusting the inclination angle of the test piece to 90 degrees, and enabling the test piece to be coincident with the vertical datum line in the visual fields of the two total station instruments by changing X, Y coordinates of the XY table top;
d. deviation of diffraction angle
Adjusting the included angle between an incident neutron beam and a diffracted neutron beam to a specified Bragg diffraction angle according to the selection of a crystal face to be detected of the test piece, and adjusting the rotation of the rotating platform around the rotating shaft through a three-dimensional coordinate to enable the rotating shaft of the test piece to be positioned on a bisection plane of a diffraction angle compensation angle;
e. in situ ambient condition loading
The mechanical loading of the test piece is realized by driving a test piece clamp to translate through a driving lead screw by a force loading motor, the engineering stress of the test piece is measured in real time by a tension-compression sensor, the engineering strain of the test piece is read by a video extensometer, the test piece is heated by an induction heating coil and is subjected to contact temperature measurement by a thermocouple, and the inclination and autorotation motion of the test piece are controlled by an alternating current servo motor and corresponding angles are calculated;
f. neutron diffraction spectrum acquisition
Specifying a test environment condition according to an experiment requirement, judging whether the in-situ condition realized in the step e meets the test requirement, if so, acquiring and storing a neutron diffraction spectrum by a neutron diffraction stress analysis spectrometer, then, selecting and changing the condition to continue the test or finish the experiment, otherwise, repeating the steps e and f until the experiment is finished, fixing the inclination angle, the rotation angle and the temperature of the test piece (12) when in-situ neutron stress measurement is carried out, and acquiring the neutron diffraction spectrum under different engineering stresses or engineering strains; when in-situ neutron texture measurement is carried out, the engineering stress, the engineering strain and the temperature of the test piece (12) are fixed, and a neutron diffraction spectrum is acquired by taking an inclination angle and a rotation angle as variables.
In the step d, the test piece rotation axis is placed in the diffraction angle compensation angle bisection plane, so that the diffraction vector can traverse the whole sample space in the 0-90-degree inclination and 360-degree rotation motion of the test piece, and the measurement of the complete texture pole figure and the stress test of the test piece in any direction can be realized.
And e, connecting the induction heating coils used in the step e by adopting a symmetrical double-coil series positive connection method, and ensuring that a neutron light path in a measurement area in the middle of the test piece is not shielded.
The in-situ neutron diffraction stress and texture composite test method provided by the invention uses an in-situ environment loading device, a three-dimensional coordinate adjusting rotary table and a total station positioning system, realizes accurate positioning of a test piece and composite loading of a tilting function, a force load and a temperature field in-situ test, and completes acquisition of an in-situ neutron diffraction spectrum by using a neutron stress spectrometer. During testing, firstly, a sample is accurately positioned, and the alignment state of the test piece and the neutron beam spot is accurately adjusted by adjusting the three-dimensional translation and 360-degree rotation of the rotating table through three-dimensional coordinates according to the alignment state of the neutron beam focus, the view field intersection point of the double full station instruments and the test piece point to be tested. And then, carrying out any specified tensile/compressive loading on the test piece within 50kN by using an in-situ environment loading device, and carrying out continuous variable temperature, 0-90-degree inclination and 360-degree rotation at room temperature to 1000 ℃. And finally, after the environmental condition to be tested is stable, the acquisition of the in-situ neutron diffraction spectrum is completed by a neutron diffraction stress analysis spectrometer.
The in-situ neutron diffraction stress and texture composite testing method is suitable for neutron stress measurement or texture pole figure test in any specified direction of a crystal material under the composite loading of four in-situ degrees of freedom of force, heat, inclination and rotation, and can also be used for in-situ neutron stress and texture composite detection of small engineering components.
Drawings
FIG. 1 is a schematic diagram of a layout relationship among a positioning device, an in-situ environment loading device and neutron beam current of the in-situ neutron diffraction stress and texture composite test method of the present invention;
FIG. 2 is a flow chart of the in-situ neutron diffraction stress and texture composite test method of the present invention;
FIG. 3 is a schematic diagram of an XY table top of a three-dimensional coordinate adjustment rotary table and a center mark thereof;
fig. 4 is a schematic diagram of a reference line and a focus mark in a total station view field;
FIG. 5 is a schematic diagram of a diffraction geometry for a given Bragg diffraction angle;
in the figure, 1, a bottom plate 2, a positioning pin hole 3, an in-situ environment loading device 4, an inclined rotating guide rail 5, a mechanical loading support 6, a force loading motor 7, a driving screw rod 8, a tension and compression sensor 9, a test piece rotating shaft 10, a rotation supporting assembly 11, a test piece clamp 12, a test piece 13, an induction heating coil 14, a video extensometer 15, a video extensometer fixing platform 16, a video extensometer triangular support 17, a video extensometer triangular support fixing base 18, an XY table top 19, an X coordinate adjusting screw rod 20, an X coordinate adjusting motor 21, an X coordinate adjusting chute 22, a Y coordinate adjusting screw rod 23, a Y coordinate adjusting motor 24, a Y coordinate adjusting chute 25, a three-dimensional coordinate adjusting rotating table 26, a neutron beam height mark 28, a first total station 29, a lifting rod 30, a total station supporting table 31, a total station triangular support 32, a total station triangular support fixing base 33, a thermoelectric coordinate adjusting table 26, a rotating shaft 27 Incident neutron beam 35, diffracted neutron beam 36, XY table center mark 37, second total station 38, horizontal datum line 39, vertical datum line 40, focus 41, Bragg diffraction angle 42 and diffraction vector.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a layout relationship among a positioning device, an in-situ environment loading device and neutron beam current in the in-situ neutron diffraction stress and texture composite testing method, wherein hardware components include three major parts, namely an in-situ environment loading device, a three-dimensional coordinate adjusting rotary table and a total station positioning system, and specifically include a bottom plate 1, a positioning pin hole 2, an in-situ environment loading device 3, an inclined rotary guide rail 4, a mechanical loading support 5, a force loading motor 6, a driving screw 7, a tension and compression sensor 8, a test piece rotation shaft 9, a rotation support assembly 10, a test piece clamp 11, an induction heating coil 13, a video extensometer 14, a video extensometer fixing platform 15, a video extensometer triangular support 16, a video extensometer triangular support fixing base 17, an XY table top 18, an X coordinate adjusting screw 19, an X coordinate adjusting motor 20, an X coordinate adjusting chute 21, a Y coordinate adjusting screw 22, The system comprises a Y coordinate adjusting motor 23, a Y coordinate adjusting chute 24, a three-dimensional coordinate adjusting rotary table 25, a neutron beam height mark 27, a first total station 28, a lifting rod 29, a total station supporting table 30, a total station triangular support 31, a total station triangular support fixing base 32, a thermocouple 33, an incident neutron beam 34, a diffraction neutron beam 35 and a second total station 37.
FIG. 2 is a testing flow chart of the in-situ neutron diffraction stress and texture composite testing method, which comprises three major parts, namely, accurate positioning of a sample, loading of in-situ environmental conditions and acquisition of a neutron diffraction spectrum.
Fig. 3 shows the XY table 18 and the XY table center mark 36 of the three-dimensional coordinate adjustment rotary table.
Fig. 4 is a positioning identification line in a total station view field, which specifically includes a horizontal reference line 38, a vertical reference line 39, and a focus 40.
Fig. 5 is a diffraction geometry diagram specifying bragg diffraction angles, specifically including incident neutron beam 34, diffracted neutron beam 35, bragg diffraction angle 41, and diffraction vector 42.
The in-situ neutron diffraction stress and texture composite test method comprises the following specific operation steps:
(1) total station positioning
Arranging the three-dimensional coordinate adjusting rotating platform 25, the first total station 28 and the second total station 37 according to a triangular position relation shown in fig. 1, adjusting the total station to a horizontal state through a total station supporting platform 30, adjusting the height of the total station by using a lifting rod 29, enabling the neutron beam height marks 27 observed through the first total station 28 and the second total station 37 to be located at a central focus 40 of a visual field, enabling the XY table top center mark 36 to be located on vertical reference lines 39 of the visual fields of the two total stations simultaneously through horizontal rotation of the total station, and then adjusting the elevation angles of the two total stations to be zero. At the moment, the focus of the sight lines of the two whole station instruments is the position of the neutron beam spot.
(2) Sample preparation
And clamping two ends of a to-be-tested piece 12 through a test piece clamp 11, and integrally installing the to-be-tested piece on the in-situ environment loading device 3. The specimen holder 11 is custom-adjustable depending on the type of experiment (tensile/compression experiment) and the specimen diameter.
(3) Sample positioning
The in-situ environment loading device 3 is connected with the XY table surface 18 of the three-dimensional coordinate adjusting rotating table 25 through the positioning pin holes 2 on the bottom plate 1, so as to ensure the synchronous motion of the two. The inclination angle of the test piece 12 is adjusted to 0 ° by inclining the rotating guide 4, and then the height of the three-dimensional coordinate adjusting rotating table 25 is adjusted so that the center line of the test piece 12 observed by the first total station 28 coincides with the horizontal reference line 38. Next, the inclination angle of the test piece 12 is adjusted to 90 °, and the center line of the test piece 12 is simultaneously made to coincide with the vertical reference line 39 in the field of view of the two-station apparatus by changing the X, Y coordinates of the XY table 18. At this time, the center position of the specimen 12 performing the tilting and autorotation motion coincides with the position of the neutron beam spot.
(4) Deviation of diffraction angle
Adjusting the included angle between the incident neutron beam 34 and the diffraction neutron beam 35 to a specified Bragg diffraction angle 41 according to the selection of the to-be-detected (hkl) crystal face of the test piece 12, wherein the Bragg diffraction angle 41 is determined according to a Bragg equation, namely
2dhklsinθhkl＝nλ. (1)
In the formula (1), dhklIs the interplanar spacing, θ, of the (hkl) crystal plane to be measuredhklThe bragg angle of the (hkl) crystal plane is, n is the number of interference orders n is 1,2,3 …, and λ is the wavelength of the monochromatic neutron beam. Taking the number of interference orders n as 1,2 thetahklI.e. the diffraction angle 41 shown in fig. 5. Subsequently, the rotating table 25 is adjusted by three-dimensional coordinatesThe rotation around the rotation axis 26 makes the rotation axis 9 of the test piece located on the plane bisecting the angle complement of the diffraction angle. At this time, the diffraction vector 42 can traverse the whole sample space in the 0-90 ° inclination and 360 ° rotation motion of the test piece 12, thereby realizing the measurement of the complete texture pole figure and the stress test of the test piece in any direction.
(5) In situ ambient condition loading
The mechanical loading of the test piece 12 is realized by driving a test piece clamp 11 to translate through a driving screw 7 by a force loading motor 6, the engineering stress of the test piece 12 is measured in real time by a tension-compression sensor 8, the engineering strain of the test piece 12 is read by a video extensometer 14, and the real stress and the real strain are obtained by the two modes of (2) and (3)
σT＝σE(1+εE)， (2)
εT＝ln(1+εE). (3)
Wherein σT、εT、σE、εETrue stress, true strain, engineering stress and engineering strain, respectively.
The test piece 12 is heated by an induction heating coil 13. In order to ensure that the neutron optical path in the middle measurement area of the test piece 12 is not blocked, the induction heating coils 13 are connected by adopting a symmetrical double-coil series-connection forward connection method, as shown in fig. 1. The temperature T of the test piece 12 is contact-measured by the thermocouple 33. The inclination angle χ and the rotation angle Φ of the test piece 12 are controlled by the ac servo motor and read.
(6) Neutron diffraction spectrum acquisition
Confirming the experiment type according to the requirement, if in-situ neutron stress measurement is carried out, fixing the inclination angle chi, the rotation angle phi and the temperature T of the test piece 12 under different loading forces sigmaEOr engineering strain epsilonENeutron diffraction spectra were collected and the microscopic strain epsilon of the (hkl) crystal planes in the indicated direction of test piece 12hklCan be given by
Wherein d ishkl、dhkl,0、θhkl、θhkl,0Interplanar spacing, stress-free behavior of (hkl) facets respectivelyThe spacing of the mode lattice planes, the neutron diffraction peak position and the neutron diffraction peak position in an unstressed state. The neutron diffraction peak position here is obtained by fitting a neutron diffraction spectrum.
If in-situ neutron texture measurement is performed, the temperature T and the strain epsilon of the test piece 12 are fixedEOr the loading force σEThe neutron diffraction spectrum is scanned with a combination of the inclination angle χ and the rotation angle Φ as variables. The tilt angle χ and the rotation angle Φ are preferably selected such that the diffraction vector 42 covers the entire sample volume when moving relative to the test piece 12 (e.g., χ 5 °, 0,5,10, …,355 °, χ 15 °, 0,5,10, …,355 °, …, χ 85 °, 0,5,10, …,355 °). In-situ condition (T, ε) of (hkl) crystal plane of test piece 12E,σE) Lower pole density distribution function phkl(α) is given by
Wherein α and β are the inclination angle and rotation angle of the polar density direction relative to the sample coordinate system, respectively, and α ═ χ and β ═ Φhkl(α) is the integrated intensity of the (hkl) crystal plane diffraction peak of test piece 12 in the (α) direction, and Δ α and Δ β are the steps of the tilt angle and the rotation angle, respectively.
Before testing, judging whether the in-situ conditions realized in the step (5) meet the testing requirements according to the environmental conditions specified by the experimental requirements. If yes, acquiring and storing neutron diffraction spectrum according to the steps, and then selecting and changing conditions to continue testing or end the experiment; otherwise, repeating the step (5) and the step (6) until the experiment is finished.
The above steps are the specific implementation process of the present invention in the flowchart of fig. 2.
In conclusion, the in-situ neutron diffraction stress and texture composite testing method provided by the invention realizes accurate positioning of a submillimeter-grade sample and force-heat-tilt-turn four-degree-of-freedom composite in-situ condition loading required by in-situ experiments of material-grade test pieces or small engineering parts, and finally completes in-situ neutron diffraction stress and texture composite detection.
Claims (3)
1. The in-situ neutron diffraction stress and texture composite test method is characterized in that an experimental device for in-situ neutron diffraction stress and texture composite test comprises an in-situ environment loading device (3), a three-dimensional coordinate adjusting rotating table (25), a first total station (28) and a second total station (37), wherein the in-situ environment loading device (3) is connected with an XY table top (18) of the three-dimensional coordinate adjusting rotating table (25) through a positioning pin hole (2) in a bottom plate (1), the three-dimensional coordinate adjusting rotating table (25), the first total station (28) and the second total station (37) are distributed according to a triangular position relation, and the test method comprises the following steps:
a. total station positioning
Adjusting all total stations to be horizontal through a total station supporting table (30), adjusting the height of the total stations by using a lifting rod (29), enabling neutron beam height marks (27) observed through a first total station (28) and a second total station (37) to be located at a central focus (40) of a visual field, enabling XY table surface central marks (36) to be located on vertical reference lines (39) of the visual fields of the two total stations simultaneously through horizontal rotation of the total stations, and then adjusting the elevation angles of the two total stations to be zero;
b. sample preparation
Two ends of a to-be-tested piece (12) are clamped by a test piece clamp (11) and are arranged on the in-situ environment loading device (3);
c. sample positioning
Adjusting the inclination angle of the test piece (12) to zero through the inclined rotating guide rail (4), adjusting the height of the three-dimensional coordinate adjusting rotating platform (25), enabling the test piece (12) observed through the first total station (28) to coincide with the horizontal datum line (38), then adjusting the inclination angle of the test piece (12) to 90 degrees, and enabling the test piece (12) to coincide with the vertical datum line (39) in the visual fields of the two total stations at the same time by changing X, Y coordinates of the XY table top (18);
d. deviation of diffraction angle
Adjusting an included angle between an incident neutron beam (34) and a diffraction neutron beam (35) to a specified Bragg diffraction angle (41) according to the selection of a crystal face to be detected of a test piece (12), and enabling a test piece rotating shaft (9) to be located on a bisection plane of a diffraction angle compensation angle through the rotation of a three-dimensional coordinate adjusting rotating table (25) around a rotating shaft (26);
e. in situ ambient condition loading
The mechanical loading of the test piece (12) is realized by driving a test piece clamp (11) to translate through a driving lead screw (7) by a force loading motor (6), the engineering stress of the test piece (12) is measured in real time by a tension-compression sensor (8), the engineering strain of the test piece (12) is read by a video extensometer (14), the test piece (12) is heated by an induction heating coil (13) and is subjected to contact temperature measurement by a thermocouple (33), and the inclination and autorotation motion of the test piece (12) are controlled by an alternating current servo motor and corresponding angles are calculated;
f. neutron diffraction spectrum acquisition
Specifying a test environment condition according to an experiment requirement, judging whether the in-situ condition realized in the step e meets the test requirement, if so, acquiring and storing a neutron diffraction spectrum by a neutron diffraction stress analysis spectrometer, then, selecting and changing the condition to continue the test or finish the experiment, otherwise, repeating the steps e and f until the experiment is finished, fixing the inclination angle, the rotation angle and the temperature of the test piece (12) when in-situ neutron stress measurement is carried out, and acquiring the neutron diffraction spectrum under different engineering stresses or engineering strains; when in-situ neutron texture measurement is carried out, the engineering stress, the engineering strain and the temperature of the test piece (12) are fixed, and a neutron diffraction spectrum is acquired by taking an inclination angle and a rotation angle as variables.
2. The in-situ neutron diffraction stress and texture composite testing method according to claim 1, characterized in that in the step d, the test piece rotation axis (9) is placed in the diffraction angle compensation angle bisector, so that the diffraction vector (42) can traverse the whole sample space in the 0-90 degree inclination and 360 degree autorotation motion of the test piece (12), thereby realizing the complete texture pole figure measurement and the stress test of the test piece in any direction.
3. The in-situ neutron diffraction stress and texture composite testing method according to claim 1, characterized in that the induction heating coils (13) used in the step e are connected by adopting a symmetrical double-coil series connection direct connection method, so that a neutron light path in a middle measuring area of the test piece (12) is ensured to be free of shielding.
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| CN108490009B (en) * | 2018-03-30 | 2020-09-08 | 中国石油大学(华东) | Neutron diffraction test method for welding residual stress of duplex stainless steel thick plate |
| CN109187607A (en) * | 2018-09-19 | 2019-01-11 | 中国科学院金属研究所 | A kind of method that the full pole figure of X-ray diffraction tests Koln coefficient in zircaloy |
| CN109596646A (en) * | 2018-12-30 | 2019-04-09 | 东莞材料基因高等理工研究院 | A kind of in situ X-ray diffraction CT imaging device for Neutron diffractometer |
| CN110411629A (en) * | 2019-07-05 | 2019-11-05 | 东莞材料基因高等理工研究院 | A kind of multi-functional welding in-situ testing device |
| CN110530909A (en) * | 2019-08-14 | 2019-12-03 | 中国原子能科学研究院 | One kind being suitable for neutron diffraction Euler ring tension-torsion composite in-situ tester |
| CN110646445A (en) * | 2019-11-12 | 2020-01-03 | 中国工程物理研究院核物理与化学研究所 | Angle measuring device and using method thereof |
| CN110763712A (en) * | 2019-11-12 | 2020-02-07 | 中国工程物理研究院核物理与化学研究所 | Nondestructive measurement method for depth distribution of phase components of component |
| CN111474192A (en) * | 2020-03-24 | 2020-07-31 | 上海交通大学 | Neutron diffraction measurement method and system for tracking second-order stress distribution of specific orientation |
| CN111965027A (en) * | 2020-08-13 | 2020-11-20 | 中国科学院上海应用物理研究所 | Micro CT (computed tomography) in-situ tensile testing device |
| CN112763341A (en) * | 2020-12-24 | 2021-05-07 | 中国工程物理研究院核物理与化学研究所 | In-situ induction heating device for neutron diffraction measurement |
| CN112945994B (en) * | 2021-02-02 | 2022-03-11 | 中国原子能科学研究院 | Sample loading and heating device for neutron texture diffraction spectrometer |
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