A kind of preparation method of slender metal material tensile specimen

A technique for tensile specimens and metal materials, which is applied in the field of preparation of slender metallic material tensile specimens, can solve problems such as size control, and achieves the effects of convenient operation, difficulty in controlling the size of samples, and simple method.

Active Publication Date: 2021-06-11
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] In order to solve the size control problem in the existing electrochemical processing of small-scale tensile samples, the purpose of the present invention is to provide a preparation method for elongated metal material tensile samples, using the deflection produced by the gravity of the sample itself, which can Effectively solve the problem of size control in the electrolytic machining process, and effectively realize the preparation of slender tensile samples

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  • A kind of preparation method of slender metal material tensile specimen
  • A kind of preparation method of slender metal material tensile specimen
  • A kind of preparation method of slender metal material tensile specimen

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Embodiment 1

[0039] The invention relates to a method for preparing an elongated metal material tensile sample, and the target sample gauge section size is: 10 millimeters in length, 40 microns in width, and 40 microns in thickness.

[0040] Concrete preparation process is as follows:

[0041] (1) The initial sample is processed by wire electric discharge cutting equipment, and the cross section of the initial sample is square. The material of sample 1 is maraging steel; each surface is polished with sandpaper to remove wire cutting marks; in order to achieve an ideal surface state, the model of sandpaper is recommended to be No. 1200.

[0042] (2) According to the target size of the sample ( figure 1 ) and the density of the material to calculate the sample’s drop height h at the end of the free clamping end of the sample when the inclination angle is θ; in order to achieve the ideal observation effect, the inclination angle is selected to be 60° ( figure 2 ).

[0043] The calculation...

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Abstract

The invention discloses a method for preparing a tensile sample of an elongated metal material, and belongs to the technical field of sample preprocessing and preparation for material analysis and testing. The method includes steps: (1) Processing a sample prototype by electric discharge wire cutting. (2) Calculate the deflection when the sample is tilted at a certain angle through the target geometric size, elastic modulus and density of the sample. (3) Prepare an electrolytic solution. (4) Using the sample as an anode, put the sample into the electrolytic solution at a certain angle to perform electrolytic corrosion processing on the sample. Stop electrolytic corrosion processing when the deflection of the sample reaches the requirement. It is convenient and quick to prepare ultra-fine tensile samples by adopting the invention, and the required equipment is simple. The size of the sample is more flexible, the repeatability of the preparation is good, and it is suitable for the commonly used micro-scale mechanical performance testing machine.

Description

technical field [0001] The invention relates to the technical field of sample preprocessing and preparation for material analysis and testing, in particular to a method for preparing elongated metal material tensile samples. Background technique [0002] In recent years, the mechanical properties of materials at small scales have become a research hotspot because of their differences from bulk scales. At present, the commonly used small-scale material processing methods include: magnetron sputtering, electrodeposition, micromachining, laser beam processing and ion beam processing. Among them, although the samples prepared by magnetron sputtering and electrodeposition are small-scale materials, due to process differences, the microstructure and properties of bulk samples are not comparable, and cannot meet the requirements of testing the special mechanical properties of bulk materials through small samples. . Micromachining will leave residual stress on the surface of the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 张鹏许自宽王斌段启强张哲峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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