Method for measuring metal bar textures

A technology of metal rods and the same metal, applied in the direction of measuring devices, analyzing materials, and using wave/particle radiation for material analysis, etc., can solve the physical properties of difficult materials, the lack of macroscopic representativeness and statistics, and the difficulty of sample preparation And other issues

Active Publication Date: 2012-09-19
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires long-term chemical etching and precise control of the thickness of the thinning, and the sample preparation is quite difficult
In addition, EBSD studies the orientation relationship of a small number of grains from a microscopic perspective, and the macroscopic representation and statistics are insufficient, making it difficult to predict the physical properties of materials.

Method used

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  • Method for measuring metal bar textures
  • Method for measuring metal bar textures
  • Method for measuring metal bar textures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Determination of the texture of titanium alloy rods: the diameter of titanium alloy rod samples is 16mm. The non-textured standard sample is titanium powder below 600 mesh, with a purity of 99.8%. Put the titanium powder into the filling area of ​​the cylindrical sample holder little by little. The projected size of the filling area is 8X15mm, and the depth is 0.5mm. The material is the same, and the powder is compacted using a semi-cylindrical female mold. The surface of the powder standard sample is required to have the same curvature as the bar, and it is used as a non-textured standard sample. Using the same test conditions, on the X-ray diffractometer, fix the goniometer in the diffraction direction of the {0002} crystal plane, and measure the diffraction intensity, tilt angle and χ from 0° to 75°, rotation angle From 0° to 360°, the step size is 5°. Plot the {0002} pole figure with corrected strength. Continue to measure {11-20}, {1-101}, {1-102} and {1-103} p...

Embodiment 2

[0028] Determination of the texture of titanium alloy rods: the diameter of titanium alloy rod samples is 19.050mm. The non-textured standard sample is titanium powder below 600 mesh, with a purity of 99.8%. The titanium powder is put into a cylindrical molding mold little by little. The diameter of the cavity is the same as that of the bar sample, and the pressing pressure is 200MPa. After demolding, the obtained The standard sample is a cylindrical compact with a length of 20 mm and a diameter of 19.050. Using the same test conditions, on the X-ray diffractometer, fix the goniometer in the diffraction direction of the {0002} crystal plane, and measure the diffraction intensity, tilt angle and χ from 0° to 75°, rotation angle From 0° to 360°, the step size is 5°. Plot the {0002} pole figure with corrected strength. Continue to measure {11-20}, {1-101}, {1-102} and {1-103} pole figures according to the above method. The omnipolar figure and orientation distribution functi...

Embodiment 3

[0030]Determination of the texture of the aluminum alloy bar: the diameter of the cold-rolled aluminum alloy bar sample is 10mm. The non-textured standard sample is aluminum powder below 600 mesh, with a purity of 98%. Put the aluminum powder into the filling area of ​​the cylindrical sample holder little by little. The projection size of the filling area is 3X15mm, and the depth is 0.2mm. The material is the same, and the powder is compacted using a semi-cylindrical female mold. The surface of the powder standard sample is required to have the same curvature as the bar, and it is used as a non-textured standard sample. Using the same test conditions, on the X-ray diffractometer, fix the goniometer on the diffraction direction of the {110} crystal plane, and measure the diffraction intensity, tilt angle and χ from 0° to 75°, rotation angle From 0° to 360°, the step size is 5°. Plot a {110} pole figure with corrected intensities. Continue to measure {200} and {211} pole fig...

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Abstract

The invention belongs to the measuring technology, and relates to the improvement of the method for measuring metal bar textures. The method includes the steps of processing a concave standard sample frame in which powder can be filled; pressing a column base standard sample; drawing pole figures through an X ray reflection method, respectively measuring diffracted intensity of different tilting angles x and rotation angles of a bar and the standard sample under the same measuring condition and parameters for compensating defocusing caused by compensation tilting angles x, and correcting the influence of shapes on diffracted intensity caused by the rotation angles; and calculating the orientation distribution function (ODF) of a complete pole figure and textures. According to the method for measuring metal bar textures, the difficulty that the influence of curved surface test sample shapes on X ray diffracted intensity cannot be corrected is overcome, and direct accurate measurement of metal bar textures is achieved.

Description

technical field [0001] The invention relates to a technique for measuring the texture of metal materials, in particular to a technique for measuring the texture of materials with curved surfaces such as metal rods. Background technique [0002] Bars generally refer to simple shapes such as circular, square, hexagonal, octagonal, curved, etc. in cross-section, and the length is relatively large compared to the cross-sectional size, and are usually provided in strips, especially straight strips. A variety of material products, among which metal round bars have the largest output and widest uses, and are the basic raw materials for industry. In addition to being directly used as stress-bearing components of bridges and buildings, it is also widely used for mechanical processing to manufacture mechanical parts and auto parts needed by various industries. [0003] Metal bars prepared by industrial methods generally have plastic deformation processes (such as rolling, drawing, ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/207
Inventor 张旺峰王玉会颜孟奇李艳
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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