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Sample residual stress detection method

A technology of residual stress and detection method, applied in the field of X-ray detection, can solve the problems of low detection efficiency, cumbersome operation of adjusting angle and distance, and inability to achieve continuous measurement, and achieve the effect of simple operation and high detection efficiency.

Pending Publication Date: 2022-06-24
西北稀有金属材料研究院宁夏有限公司
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Problems solved by technology

During multi-point detection, the operation of adjusting the angle and distance is too cumbersome to achieve continuous measurement, and the detection efficiency is low

Method used

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  • Sample residual stress detection method
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Embodiment Construction

[0048] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0049] This embodiment provides a method for detecting residual stress of a sample, refer to figure 1 , the sample residual stress detection method includes the following steps:

[0050] Step 1: Determine and mark multiple points to be measured on the sample to be measured.

[0051] The sample to be tested in this embodiment generally has a complex shape. For example, the surface of the sample to be tested is a curved surface, a spherical surface and a sloped surface, and the bottom surface is a groove, a sloped surface, and a curved surface. Figure 4 The surface and bottom of the metal block in are curved, such as Figure 5 The surface of the rectangular metal block is a flat surface, and the bottom surface is a V-groove surface.

[0052] Step 2: Selecting a to-be-measured point from a plurality of to-be-measured points as the to-be-mea...

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Abstract

The invention provides a method for detecting residual stress of a sample. The method comprises the following steps: determining and marking a plurality of points to be detected on a sample to be detected; selecting one to-be-measured point from the plurality of to-be-measured points as a to-be-measured reference point; a to-be-detected sample is placed on a sample adjusting support, and a first detection angle and a first detection focal length of the detector in the sample residual stress detection process of the to-be-detected reference point are obtained through the sample adjusting support; according to the reference point to be detected and other points to be detected, determining an angle compensation value and a focal length compensation value of each other point to be detected so as to obtain a second detection angle and a second detection focal length of the detector in the sample residual stress detection process of each other point to be detected; and continuously detecting the sample residual stress of each to-be-detected point on the to-be-detected sample by adopting the second detection angle and the second detection focal length. According to the invention, the residual stress of the to-be-detected sample with a complex shape can be continuously detected, the detection efficiency is high, and the operation is simple.

Description

technical field [0001] The invention belongs to the technical field of X-ray detection, in particular to a method for detecting residual stress of a sample. Background technique [0002] X-ray residual stress detection, the measurement principle is to irradiate the point to be measured with X-ray and collect the diffraction signal, according to the displacement of the diffraction line, measure the relative change of the interplanar spacing d, that is, the strain, and then apply the difference between stress and strain in elastic mechanics. relationship to find the residual stress. The detection steps are: adjust the center line of the detector to be vertical, leave a sufficient distance between the detector and the sample, determine the point to be measured on the surface of the sample, and adjust the micro-area plane where the point to be measured is located (referred to as the micro-area surface to be measured, usually Φ0.5mm-2mm circle) is horizontal and perpendicular to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L5/00G01L1/25
CPCG01L5/0047G01L1/25
Inventor 黄旭刚李志年孙磊饶晓方
Owner 西北稀有金属材料研究院宁夏有限公司
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