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Preparation method of slender metal material tensile sample

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

Active Publication Date: 2020-02-04
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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  • Preparation method of slender metal material tensile sample
  • Preparation method of slender metal material tensile sample
  • Preparation method of slender metal material tensile sample

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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 preparation method of a slender metal material tensile sample, and belongs to the technical field of sample preprocessing preparation of material analysis and testing. The method comprises the following steps of: (1) processing a sample prototype through wire cut electrical discharge machining; and (2) calculating the deflection of the sample when the sample is inclined at a certain angle according to the target geometric dimension, elasticity modulus and density of the sample; (3) preparing an electrolytic solution; and (4) by taking the sample as an anode, putting the sample into the electrolytic solution in a manner of inclining by a certain angle to perform electrolytic corrosion processing on the sample. When the deflection of the sample meets the requirement, electrolytic corrosion processing is stopped. The method is convenient and quick to prepare the superfine tensile sample, and the required equipment is simple. The sample is flexible in size, good in preparation repeatability and suitable for a common micro-scale mechanical property 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 Applications(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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