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Method for quickly and accurately calibrating slip line by using pole graph analysis

A calibration method and slip line technology, applied in the direction of material analysis using wave/particle radiation, material analysis using measurement of secondary emissions, and material analysis, can solve the problems of difficult and slow calibration of surface slip lines, Achieve accurate judgment, improve research depth, fast and accurate calibration

Pending Publication Date: 2021-08-03
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problem of difficult and slow calibration of existing surface slip lines, and provides a fast and accurate calibration method of slip lines using pole figure analysis

Method used

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  • Method for quickly and accurately calibrating slip line by using pole graph analysis
  • Method for quickly and accurately calibrating slip line by using pole graph analysis
  • Method for quickly and accurately calibrating slip line by using pole graph analysis

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Experimental program
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specific Embodiment approach 1

[0014] Specific implementation mode 1: In this implementation mode, a method for fast and accurate calibration of slip lines using pole figure analysis is specifically carried out according to the following steps:

[0015] 1. Preliminary preparation: Polish the sample, and then carry out tensile deformation, so that a slip line appears on the surface of the sample, and obtain the sample to be observed; fix the sample to be observed on the sample stage with an inclination angle of 70°, and wait for observation When observing the sample, ensure that the observation surface where the slip line is located is kept parallel to the sample stage, and conduct secondary electron and electron backscattered diffraction analysis in sequence. Scan the same area as the electron backscatter diffraction as the selected scanning area;

[0016] 2. Experimental data processing: select the secondary electron image in the selected scanning area, mark the direction of the slip line to be analyzed on...

specific Embodiment approach 2

[0020] Embodiment 2: This embodiment differs from Embodiment 1 in that the sample material in step 1 is pure titanium, titanium alloy or magnesium alloy with HCP structure. Others are the same as the first embodiment.

specific Embodiment approach 3

[0021] Embodiment 3: This embodiment differs from Embodiment 1 to Embodiment 2 in that: the sample material in step 1 is pure copper or copper alloy with FCC structure. Others are the same as one of the specific embodiments 1 to 2.

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Abstract

The invention relates to a method for quickly and accurately calibrating a slip line by utilizing pole figure analysis. The objective of the invention is to solve the problems of difficult surface slip line calibration and slow speed in the prior art. The method comprises the following steps: 1, performign early-stage preparation: polishing a sample, then carrying out tensile deformation to generate a slip line, fixing a sample to be observed on a sample table, and carrying out secondary electron and electron back scattering diffraction analysis; 2, processing experimental data: establishing a slip line analysis model; and 3, analyzing the slip line: calibrating the corresponding position of each slip surface of the metal at the selected point on the slip line in the pole diagram by using the model, taking the direction of the center connecting line and the vertical line as the undetermined slip line direction, and comparing the actual slip line direction calibrated in the secondary electron image in the step 2 to obtain the undetermined slip line direction. The sliding surface with the completely matched direction is the sliding system of the actual motion at the position. The method is used for rapidly and accurately calibrating the slip system corresponding to the metal surface slip line.

Description

technical field [0001] The invention relates to a fast and accurate calibration method for slip lines using pole figure analysis. Background technique [0002] Plastic processing is an important metal processing method in aerospace, marine and civil fields, and it is widely used in these fields. Slip is one of the main forms of plastic deformation. Due to the particularity of slip, it is difficult to observe its motion process. Generally, the shape of slip can only be observed under a transmission electron microscope. Polishing the metal surface, and then plastically deforming, a large number of slip lines (slip steps) will appear on the surface. The distribution and intensity of slip can be judged through the slip lines (slip steps), which is currently the most effective It is one of the slip research methods, and it is also a key content in the field of plastic deformation. The slip systems of conventional crystal structures such as body-centered cubic (BCC), face-center...

Claims

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Application Information

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IPC IPC(8): G01N23/22G01N23/2202G01N23/20008G01N23/203
CPCG01N23/22G01N23/2202G01N23/20008G01N23/203
Inventor 邵斌宗影影唐伟王继伟杨万里单德彬郭斌
Owner HARBIN INST OF TECH
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