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FeCoNiCrMnAl high-entropy alloy electrolytic corrosion electrolyte and metallographic structure display method thereof

A metallographic structure display, high-entropy alloy technology, applied in the field of high-entropy alloys, can solve the problem of poor effect of ordinary aqua regia, achieve good grain boundary corrosion effect, high-efficiency and short-time realization, and strong corrosion resistance

Pending Publication Date: 2020-11-24
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For FeCoNiCrMnAl high-entropy alloys, high Cr and high Al elements work together, and the effect of ordinary aqua regia is not good

Method used

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  • FeCoNiCrMnAl high-entropy alloy electrolytic corrosion electrolyte and metallographic structure display method thereof
  • FeCoNiCrMnAl high-entropy alloy electrolytic corrosion electrolyte and metallographic structure display method thereof
  • FeCoNiCrMnAl high-entropy alloy electrolytic corrosion electrolyte and metallographic structure display method thereof

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Embodiment 1

[0037] The invention provides an electrolyte solution for electrolytic corrosion of a FeCoNiCrMnAl high-entropy alloy, wherein the electrolyte solution is a perchloric acid ethanol solution with a mass fraction of 10%.

[0038] The invention provides a method for displaying the metallographic structure of a FeCoNiCrMnAl high-entropy alloy, comprising the following steps:

[0039] Firstly grind the metallographic sample roughly on 150# sandpaper, then use 200#, 400#, 600#, 800#, 1000#, 1200#, 1500# sandpaper for fine grinding, and use the same sandpaper as the previous one for the next sandpaper The direction of sandpaper grinding is perpendicular to the direction, use 150# sandpaper for rough grinding 50 times, use 200#, 400#, 600#, 800#, 1000#, 1200#, 1500# for fine grinding, each fine grinding 50 Down. Polishing agent use specification is that the synthetic diamond abrasive paste of W1.5 is polished, and polishing cloth material is woolen cloth, and lubricant is distilled w...

Embodiment 2

[0041] The invention provides an electrolyte solution for electrolytic corrosion of a FeCoNiCrMnAl high-entropy alloy, wherein the electrolyte solution is a perchloric acid ethanol solution with a mass fraction of 20%.

[0042] The invention provides a method for displaying the metallographic structure of a FeCoNiCrMnAl high-entropy alloy, comprising the following steps:

[0043] Firstly grind the metallographic sample roughly on 150# sandpaper, then use 200#, 400#, 600#, 800#, 1000#, 1200#, 1500# sandpaper for fine grinding, and use the same sandpaper as the previous one for the next sandpaper The direction of sandpaper grinding is perpendicular to the direction, use 150# sandpaper for rough grinding 50 times, use 200#, 400#, 600#, 800#, 1000#, 1200#, 1500# sandpaper for fine grinding, 50 times for each fine grinding . The polishing agent is polished with the synthetic diamond abrasive paste of W1.5, the polishing cloth material is woolen cloth, the lubricant is distilled wa...

Embodiment 3

[0045]The invention provides an electrolytic solution for electrolytic corrosion of FeCoNiCrMnAl high-entropy alloy. The electrolytic solution is a perchloric acid ethanol solution with a mass fraction of 15%.

[0046] The invention provides a method for displaying the metallographic structure of a FeCoNiCrMnAl high-entropy alloy, comprising the following steps:

[0047] Firstly grind the metallographic sample roughly on 150# sandpaper, then use 200#, 400#, 600#, 800#, 1000#, 1200#, 1500# sandpaper for fine grinding, and use the same sandpaper as the previous one for the next sandpaper The direction of sandpaper grinding is perpendicular to the direction, use 150# sandpaper for rough grinding 50 times, use 200#, 400#, 600#, 800#, 1000#, 1200#, 1500# for fine grinding, each fine grinding 50 Down. The polishing agent uses the synthetic diamond abrasive paste of W1.5 to polish, the polishing cloth material is woolen cloth, the lubricant is distilled water, the polishing disc rot...

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Abstract

The invention discloses a FeCoNiCrMnAl high-entropy alloy electrolytic corrosion electrolyte and a metallographic structure display method thereof. The electrolyte is an ethanol solution of perchloricacid with the mass percent of 10-20%, electrolytic corrosion is carried out after coarse grinding, fine grinding and polishing, the alloy sample is an anode, the platinum electrode is a cathode, theobtained metallographic structure can be rapidly and effectively corroded, the metallographic tissue structure and the grain boundary can be clearly displayed, and crystal grains are completely displayed.

Description

technical field [0001] The invention belongs to the technical field of high-entropy alloys, and more specifically relates to an electrolytic corrosion electrolyte and a method for displaying the metallographic structure of FeCoNiCrMnAl high-entropy alloys. Background technique [0002] Multi-principal high-entropy alloys are the concept of equimolar multi-principal alloys first proposed by Professor Ye Junwei in 1995 based on the study of amorphous alloys, and defined as high-entropy alloys in 2004. This alloy is mainly composed of a single face-centered cubic (FCC), body-centered cubic (BCC) or hexagonal close-packed (HCP) solid solution phase. At the same time, it also has many excellent properties such as high strength, hardness, excellent wear resistance, corrosion resistance, low temperature resistance, high temperature oxidation resistance and temper softening resistance. FeCoNiCrMnAl high-entropy alloy is a high-entropy alloy with a body-centered cubic structure (BCC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/32G01N1/28G01N21/84C25F3/02
CPCG01N1/32G01N1/286G01N21/84C25F3/02G01N2001/2866
Inventor 胡绳荪崔妍申俊琦耿可屏
Owner TIANJIN UNIV
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