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Cu-Ni alloy electro-polishing method used for EBSD test

An electrolytic polishing, cu-ni technology, applied in the preparation of test samples, etc., can solve problems such as the inability to obtain diffraction patterns

Active Publication Date: 2013-07-31
深创超导(深圳)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface stress layer generated during sample preparation prevents us from obtaining effective diffraction patterns. At this time, electropolishing technology is the most efficient and repeatable means of removing surface stress.

Method used

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  • Cu-Ni alloy electro-polishing method used for EBSD test
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  • Cu-Ni alloy electro-polishing method used for EBSD test

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] The RD-ND section of the Cu-Ni alloy billet sample was mechanically polished first, and then ultrasonically cleaned with acetone for 5 minutes after mechanical polishing. Then carry out electrolytic polishing to the Cu-Ni alloy ingot sample that mechanical polishing is good, and cathode material is metal platinum sheet, this Cu-Ni alloy electrolytic polishing liquid (concentration is the concentrated H of 98%) 2 SO 4 : concentrated H with a concentration of 85% 3 PO 4 :H 2 O=1.5:2.5:1.8) As for the low-speed stirring on the magnetic stirrer (1 revolution / second), the AC voltage during electrolytic polishing is 15V, the electrolytic polishing temperature is 25°C, and the electrolytic polishing time is 20s. After the electropolished samples were ultrasonically cleaned in acetone, they were dried and stored for EBSD testing. figure 2 It is the EBSD grain boundary diagram of the Cu-Ni alloy ingot.

example 2

[0030] The RD-ND section of the Cu-Ni alloy sample with a cold-rolled deformation of 95% was mechanically polished first, and then ultrasonically cleaned with acetone for 5 minutes after mechanical polishing. Then electropolish the Cu-Ni alloy sample with 95% cold-rolled deformation after mechanical polishing, and the cathode material is metal platinum sheet. 2 SO 4 : concentrated H with a concentration of 85% 3 PO 4 :H 2 O=1:3:1.8) As for the low-speed stirring on the magnetic stirrer (1 revolution / second), the AC voltage during electrolytic polishing is 10V, the electrolytic polishing temperature is 15°C, and the electrolytic polishing time is 10s. After the electropolished samples were ultrasonically cleaned in acetone, they were dried and stored for EBSD testing. image 3 (a) is the EBSD grain boundary diagram of the RD-ND section of the Cu-Ni alloy base strip with a cold rolling deformation of 95%.

example 3

[0032] The RD-ND section of the Cu-Ni alloy sample with a cold-rolled deformation of 98.5% was mechanically polished first, and then ultrasonically cleaned with acetone for 5 minutes after mechanical polishing. Then electrolytic polishing is carried out to the Cu-45at.%Ni alloy sample whose cold-rolled deformation of mechanical polishing is 98.5%, and the cathode material is a metal platinum sheet. h 2 SO 4 : concentrated H with a concentration of 85% 3 PO 4 :H 2 O=1:3:1.8) As for the low-speed stirring on the magnetic stirrer (0.5 rev / s), the AC voltage during electrolytic polishing is 8V, the electrolytic polishing temperature is 10°C, and the electrolytic polishing time is 10s. After the electropolished samples were ultrasonically cleaned in acetone, they were dried and stored for EBSD testing. image 3 (b) is the EBSD grain boundary diagram of the RD-ND section of the Cu-Ni alloy base strip with a cold rolling deformation of 98.5%.

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Abstract

The invention discloses a Cu-Ni alloy electro-polishing method used for an EBSD (electron back scatter diffraction) test, and relates to researches on microstructure, the texture and the like of a Cu-Ni alloy used for discovering high-temperature superconductive coat conductors through adopting an EBSD technology in the cold rolling and heat treatment processes. The electro-polishing method can be used for the sample processing before the EBSD test of the microstructure and the texture of the surface of the Cu-Ni alloy. The electro-polishing method can effectively remove the stress layer on the surface of a sample, is in favor of the generation of strong diffraction patterns during the EBSD test, and is convenient for the researches on the microstructure and the texture of the Cu-Ni alloy. The method is characterized in that the Cu-Ni alloy sample which undergoes mechanical polishing and ultrasonic cleaning is electro-polished, a cathode material is a metal platinum sheet, a Cu-Ni alloy electro-polishing liquid is stirred in a magnetic stirrer in a low speed (0.5-1r / s) mode, the alternating current voltage during the electro-polishing is 5-15V, the electro-polishing temperature is 10-25DEG C, and the electro-polishing time is 5-20s.

Description

technical field [0001] The invention is a Cu-Ni alloy electrolytic polishing method used for EBSD testing, which involves the use of electron backscatter diffraction analysis technology (EBSD) to explore the microstructure and properties of Cu-Ni alloy cold rolling and heat treatment for high-temperature superconducting coating conductors. Research on texture, etc. Background technique [0002] In the process of preparing alloy strips for coated conductors by rolling-assisted biaxial texturing technology, Cu-Ni alloys tend to form a strong cubic texture after large deformation rolling and appropriate high temperature heat treatment. With the development and needs of texture research, the formation of Cu-Ni alloy rolling texture, the transformation of texture during recrystallization, and the development mechanism of cubic texture have become subjects that researchers need to study in depth. At present, EBSD technology can take into account the research on the microstructure...

Claims

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Application Information

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IPC IPC(8): G01N1/32
Inventor 索红莉田辉马麟陈立佳孟易辰梁雅儒王金华李孟晓
Owner 深创超导(深圳)科技有限公司
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