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

Po Ting Lin; Chan Sheng Wu; Chun Hao Peng; Che Wei Tsai; Yutaka S. Sato

doi:10.1515/htmp-2020-0046

Effects of rotational speed on the Al_0.3CoCrCu_0.3FeNi high-entropy alloy by friction stir welding

Po Ting Lin, Chan Sheng Wu, Chun Hao Peng, Che Wei Tsai, Yutaka S. Sato

ENG - Materials Processing

National Tsing Hua University

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

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.

Original language	English
Pages (from-to)	556-566
Number of pages	11
Journal	High Temperature Materials and Processes
Volume	39
Issue number	1
DOIs	https://doi.org/10.1515/htmp-2020-0046
Publication status	Published - 2020 Jan 1

Keywords

High-entropy alloys
friction stir welding
microstructure

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10.1515/htmp-2020-0046

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

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.",

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note = "Funding Information: The present work was supported by the Ministry of Science and Technology grant numbers MOST 109-2634-F-007-024, MOST 108-3017-F-007-002, and MOST 106-2218-E-007-019. The support provided by the High-Entropy Materials Center from the Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education in Taiwan is greatly appreciated. Publisher Copyright: {\textcopyright} 2020 Po-Ting Lin et al., published by De Gruyter.",

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AU - Lin, Po Ting

AU - Wu, Chan Sheng

AU - Peng, Chun Hao

AU - Tsai, Che Wei

AU - Sato, Yutaka S.

N1 - Funding Information: The present work was supported by the Ministry of Science and Technology grant numbers MOST 109-2634-F-007-024, MOST 108-3017-F-007-002, and MOST 106-2218-E-007-019. The support provided by the High-Entropy Materials Center from the Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education in Taiwan is greatly appreciated. Publisher Copyright: © 2020 Po-Ting Lin et al., published by De Gruyter.

PY - 2020/1/1

Y1 - 2020/1/1

N2 - 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.

AB - 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.

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Effects of rotational speed on the Al_0.3CoCrCu_0.3FeNi high-entropy alloy by friction stir welding

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