Significant Improvement the Mechanical Properties of CoCrNi Alloy by Tailoring a Dual FCC-Phase Structure
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State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China
2
State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
*
Authors to whom correspondence should be addressed.
Materials 2020, 13(21), 4909; https://doi.org/10.3390/ma13214909
Received: 5 October 2020
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Revised: 29 October 2020
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Accepted: 30 October 2020
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Published: 31 October 2020
(This article belongs to the Section Advanced Materials Characterization)
In this work, SixCoCrNi (x = 0, 0.1, 0.2, 0.3, 0.4, molar ratio) alloys were designed by introducing elemental Si into CoCrNi, a medium-entropy alloy (MEA). The effects of Si addition on the microstructure and mechanical properties of the as-cast SiCoCrNi alloys were investigated. The results suggested that a novel Si-rich face-centred cubic (FCC) phase formed in the Si0.3CoCrNi and Si0.4CoCrNi alloys. The Si-rich FCC phase, which featured high hardness and was located between the dendrites of the matrix FCC phase (with higher phase fraction), significantly increased the yield strength of the Si0.4CoCrNi alloys five times compared with the CoCrNi alloy.
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Keywords:
SiCoCrNi alloy; microstructure; mechanical properties; FCC phase; yield strength
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MDPI and ACS Style
Yi, H.; Bi, M.; Yang, K.; Zhang, B. Significant Improvement the Mechanical Properties of CoCrNi Alloy by Tailoring a Dual FCC-Phase Structure. Materials 2020, 13, 4909. https://doi.org/10.3390/ma13214909
AMA Style
Yi H, Bi M, Yang K, Zhang B. Significant Improvement the Mechanical Properties of CoCrNi Alloy by Tailoring a Dual FCC-Phase Structure. Materials. 2020; 13(21):4909. https://doi.org/10.3390/ma13214909
Chicago/Turabian StyleYi, Hailong, Mengyuan Bi, Kang Yang, and Bing Zhang. 2020. "Significant Improvement the Mechanical Properties of CoCrNi Alloy by Tailoring a Dual FCC-Phase Structure" Materials 13, no. 21: 4909. https://doi.org/10.3390/ma13214909
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