Microstructure and Mechanical Properties of High-Entropy Alloys CoCrFeNiAl by Welding

Lang Cui; Bing Ma; Sheng Qiang Feng; Xiu Ling Wang

doi:10.4028/www.scientific.net/AMR.936.1635

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Microstructure and Mechanical Properties of High-Entropy Alloys CoCrFeNiAl by Welding
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 936Microstructure and Mechanical Properties of...

Microstructure and Mechanical Properties of High-Entropy Alloys CoCrFeNiAl by Welding

Abstract:

Five common elements Co, Cr, Fe, Ni and Al were selected, and CoCrFeNiAl was prepared by arc-melting. The microstructure and mechanical properties after spot welding were studied. The results show that the cast microstructure of high entropy alloy CoCrFeNiAl is relatively uniform with a dendritic morphology. The heat is inversely proportional with the alloy grain sizes. The greater the heat is, the smaller the grain size is, which leads to the higher hardness and more uniform tissue. But there is a critical value of the heat(Hcrit) in spot welding. When Hactu(actual heat) exceeds Hcrit, it will adversely affect the performance, resulting in crack, splash and other defects.

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Advanced Materials Research (Volume 936)

Pages:

1635-1640

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.936.1635

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Online since:

June 2014

Authors:

Lang Cui*, Bing Ma, Sheng Qiang Feng, Xiu Ling Wang

Keywords:

High Entropy Alloy, Mechanical Property, Microstructure, Multiple Principal Elements

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