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Electrolytic polishing solution and electrolytic polishing process for titanium alloy EBSD sample

An electrolytic polishing and titanium alloy technology, which is applied in the field of electrolytic polishing liquid and electrolytic polishing technology, can solve the problems of poor calibration rate stability of polishing technology, not easy to prepare, complicated components, etc., and achieve easy preparation and storage, bright and clean surface, The effect of bright and clean surface

Pending Publication Date: 2022-03-01
辽宁增材制造产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the deepening of the research, the electron backscatter diffraction (EBSD) technique used to study the crystallographic orientation and texture is more and more favored by scientific research. Compared with the transmission electron microscope technique, its sample preparation is relatively easy, but Since EBSD only occurs on the shallow surface layer of the sample surface, it is very sensitive to the stress layer on the surface, requiring no stress and no corrosion pits on the surface; the stress layer on the surface of the sample directly affects the calibration rate of the diffraction pattern, resulting in EBSD samples It is not easy to prepare. At present, the titanium alloy electrolytic polishing solution disclosed in China has the problems of complex composition and difficult preparation, and the polishing process has the problem of poor calibration rate stability.

Method used

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  • Electrolytic polishing solution and electrolytic polishing process for titanium alloy EBSD sample
  • Electrolytic polishing solution and electrolytic polishing process for titanium alloy EBSD sample

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] In this example, the surface grinding and polishing treatment of arc 3D printed Ti-6Al-4V titanium alloy includes the following steps:

[0027] (1) After the wire-cut titanium alloy sample is inlaid, it is mechanically polished by 240#, 400#, 600#, 800#, 1000#, 1200#, 1500#, 2000#, 3000#, 5000# sandpaper; And every time a piece of sandpaper is changed, the titanium alloy sample is rotated 90° for grinding to ensure that the scratches on the previous layer are covered;

[0028] (2) Polish the mechanically polished titanium alloy sample on a polishing machine, adjust the speed to 300r / min, and keep dropping the pre-prepared SiO2 containing a small amount of hydrogen peroxide during the polishing process. 2 Suspension; as the polishing process progresses, the speed is gradually adjusted to 100r / min until the bright mirror surface is thrown out, and then the inlay on the titanium alloy sample is carefully removed to prevent scratching the bright mirror surface;

[0029] (3...

Embodiment 2

[0036] The difference between this embodiment and embodiment 1 is:

[0037] In step (2), as the polishing process progresses, the rotating speed is gradually adjusted to 130r / min until the bright mirror surface is thrown out;

[0038] In step (3), each liter of electropolishing liquid comprises each component of following content: 40ml perchloric acid, 300ml n-butanol, 550ml methyl alcohol and 110ml hydrogen peroxide solution;

[0039] In step (3-3), the voltage of the DC power supply is adjusted to 26V, and the temperature of the electrolytic polishing solution is controlled at 0°C; the current during the electrolysis process is controlled at about 1.5A, and the polishing time is controlled at 15s.

[0040] Others are with embodiment 1.

Embodiment 3

[0042] The difference between this embodiment and embodiment 1 is:

[0043] In step (2), as the polishing process progresses, the rotating speed is gradually adjusted to 150r / min until the bright mirror surface is thrown out;

[0044] In step (3), each liter of electropolishing liquid comprises each component of following content: 60ml perchloric acid, 400ml n-butanol, 450ml methyl alcohol and 90ml hydrogen peroxide solution;

[0045] In step (3-3), the voltage of the DC power supply is adjusted to 28V, and the temperature of the electrolytic polishing solution is controlled at 25°C; the current during the electrolysis process is controlled at about 1.8A, and the polishing time is controlled at 5s.

[0046] Others are with embodiment 1.

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Abstract

The invention discloses an electrolytic polishing solution and an electrolytic polishing process for a titanium alloy EBSD sample, and belongs to the technical field of titanium alloy surface treatment.The electrolytic polishing solution comprises, by mass, 4-6 parts of perchloric acid, 30-40 parts of n-butyl alcohol, 45-55 parts of methyl alcohol and 9-11 parts of a hydrogen peroxide solution; the electrolytic polishing technology comprises the steps that abrasive paper grinding, mechanical polishing and electrolytic polishing are sequentially carried out, after electrolytic polishing is finished, a titanium alloy sample is put into a reagent of absolute ethyl alcohol to be washed, then ultrasonic waves are used for cleaning, and finally the surface of the sample is blow-dried through an air duct and properly stored. The electrolytic polishing solution is wide in material source, low in cost and simple to prepare, a stress layer and an oxide layer on the surface of the titanium alloy can be effectively removed, and the polished surface is bright and clean; the polishing process is easy to operate, high in calibration rate, stable in effect and convenient to widely popularize.

Description

technical field [0001] The invention relates to the technical field of titanium alloy surface treatment, in particular to an electrolytic polishing solution and an electrolytic polishing process for preparing titanium alloy EBSD samples. Background technique [0002] Titanium alloys are widely used in the aerospace field due to their high strength, high density, and light weight. With the development of aerospace in recent years, research on titanium alloys has become more and more extensive. With the deepening of the research, the electron backscatter diffraction (EBSD) technique used to study the crystallographic orientation and texture is more and more favored by scientific research. Compared with the transmission electron microscope technique, its sample preparation is relatively easy, but Since EBSD only occurs on the shallow surface layer of the sample surface, it is very sensitive to the stress layer on the surface, requiring no stress and no corrosion pits on the sur...

Claims

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Application Information

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IPC IPC(8): G01N23/203G01N23/20008G01N1/32C25F3/26
CPCG01N23/203G01N23/20008G01N1/32C25F3/26
Inventor 刘祥宇唱丽丽刘常升邢飞
Owner 辽宁增材制造产业技术研究院有限公司
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