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Microstructure and Mechanical Properties of \(\hbox {CoCrFeNi}_{2}\hbox {Al}_{1{-}{x}}\hbox {W}_{{x}}\) High Entropy Alloys

  • Research Article - Mechanical Engineering
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Abstract

The microstructures, phase composition, and mechanical properties of the \(\hbox {CoCrFeNi}_{2}\hbox {Al}_{1{-}{x}}\hbox {W}_{{x}}\) (x: molar ratio, \({x} = 0,~0.1,~0.2\), and 0.3) high entropy alloys were investigated. Only BCC phase and FCC phase were found in \(\hbox {CoCrFeNi}_{2}\hbox {Al}_{1{-}{x}}\hbox {W}_{{x}}\) alloys. Thereinto, the \(\hbox {CoCrFeNi}_{2}\hbox {Al}\) alloy was comprised of the primary phase with BCC structure and the eutectic structures with BCC and FCC phases. The \(\hbox {CoCrFeNi}_{2}\hbox {Al}_{0.9}\hbox {W}_{0.1}\), \(\hbox {CoCrFeNi}_{2}\hbox {Al}_{0.8}\hbox {W}_{0.2}\), and \(\hbox {CoCrFeNi}_{2}\hbox {Al}_{0.7}\hbox {W}_{0.3}\) alloys were comprised of the primary phase with FCC structure and the eutectic structures with BCC and FCC phases. The main effect of Al element on \(\hbox {CoCrFeNi}_{2}\hbox {Al}_{1{-}{x}}\hbox {W}_{{x}}\) alloys was tailoring the proportion of BCC phase and FCC phase, while W element played a greater role than Al element in the solid solution strengthening effect. Hence, the mechanical properties of \(\hbox {AlCoCrFeNi}_{2}\) alloy can be tailored by adjusting the concentration of Al and W elements to obtain a wider range of applications.

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Authors and Affiliations

  1. School of Materials and Energy, Guangdong University of Technology, Guangzhou, 510006, China

    Yong Dong

  2. Key Laboratory of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering, Dalian University of Technology, Dalian, 116024, China

    Yiping Lu

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  2. Yiping Lu
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Correspondence to Yong Dong or Yiping Lu.

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Dong, Y., Lu, Y. Microstructure and Mechanical Properties of \(\hbox {CoCrFeNi}_{2}\hbox {Al}_{1{-}{x}}\hbox {W}_{{x}}\) High Entropy Alloys. Arab J Sci Eng 44, 803–808 (2019). https://doi.org/10.1007/s13369-018-3297-9

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  • DOI: https://doi.org/10.1007/s13369-018-3297-9

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