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

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...

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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.

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