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Effects of rotational speed on the Al0.3CoCrCu0.3FeNi high-entropy alloy by friction stir welding

Authors :
Lin Po-Ting
Wu Chan-Sheng
Peng Chun-Hao
Tsai Che-Wei
Sato Yutaka S.
Source :
High Temperature Materials and Processes, Vol 39, Iss 1, Pp 556-566 (2020)
Publication Year :
2020
Publisher :
De Gruyter, 2020.

Abstract

Welding and relevant studies are indispensable to employ high-entropy alloys for practical applications. In this study, Al0.3CoCrCu0.3FeNi high-entropy alloy with single FCC phase was used to make “bead-on-plate” friction stir welds at different rotational speeds, and the effects on microstructure and mechanical properties were studied. Several banded structures containing oxide or nitride particles were observed in the stir zone (SZ), and the chemical wear of the polycrystalline cubic boron nitride tool was confirmed. The microhardness distribution of the welds showed higher hardness in the SZ because of grain refinement and the presence of deformed grains. The electron backscattered diffraction results suggested that the high-entropy alloy with low stacking-fault energy experienced recrystallization during friction stir welding, which was similar to other conventional materials with low stacking-fault energy.

Details

Language :
English
ISSN :
03346455 and 21910324
Volume :
39
Issue :
1
Database :
Directory of Open Access Journals
Journal :
High Temperature Materials and Processes
Publication Type :
Academic Journal
Accession number :
edsdoj.99e00ee516ae45d5a0f027f60a800b5b
Document Type :
article
Full Text :
https://doi.org/10.1515/htmp-2020-0046