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Mechanical performance of the Al x CoCrCuFeNi high-entropy alloy system with multiprincipal elements

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Abstract

The Al x CoCrCuFeNi alloys with multiprincipal elements (x=the aluminum content in molar ratio, from 0 to 3.0) were synthesized using a well-developed arc-melting and casting method, and their mechanical properties were investigated. These alloys exhibited promising mechanical properties, including excellent elevated-temperature strength and good wear resistance. With the addition of aluminum from x=0 to 3.0, the hardness of the alloys increased from HV 133 to 655, mainly attributed to the increased portion of strong bcc phase to ductile fcc phase, both of which were strengthened by the solid solution of aluminum atoms and the precipitation of nanophases. The alloys exhibited superior high-temperature strengths up to 800 °C, among which the Al0.5CoCrCuFeNi alloy, especially, had enhanced plasticity and a large strain-hardening capacity. Moreover, the wear resistance of these alloys was similar to that of ferrous alloys at the same hardness level, while the alloys with lower hardness exhibited relatively higher resistance because of their large strain-hardening capacity.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, the National Tsing Hua University, 300, Hsinchu, Taiwan

    Chung-Jin Tong (Postgraduate Student), Min-Rui Chen (Postgraduate Student), Jien-Wei Yeh (Professor) & Su-Jien Lin (Professor)

  2. Materials Science Center, the National Tsing Hua University, 300, Hsinchu, Taiwan

    Swe-Kai Chen (Professor)

  3. the Department of Materials Science and Engineering, Feng Chia University, 402, Taichung, Taiwan

    Tao-Tsung Shun (Assistant Professor)

  4. the Department of Materials Engineering, National Chung Hsing University, 402, Taichung, Taiwan

    Shou-Yi Chang (Assistant Professor)

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  1. Chung-Jin Tong
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Tong, CJ., Chen, MR., Yeh, JW. et al. Mechanical performance of the Al x CoCrCuFeNi high-entropy alloy system with multiprincipal elements. Metall Mater Trans A 36, 1263–1271 (2005). https://doi.org/10.1007/s11661-005-0218-9

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  • DOI: https://doi.org/10.1007/s11661-005-0218-9

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