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Metals 2017, 7(1), 18; doi:10.3390/met7010018

The Al Effects of Co-Free and V-Containing High-Entropy Alloys

1
State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China
2
State Key Laboratory for Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
3
College of Mechanical Engineering, Qinghai University, Xining 810016, China
4
State Key Laboratory of Nuclear Physics and Technology, Center for Applied Physics and Technology, Peking University, Beijing 100871, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Vincent Fournée
Received: 19 December 2016 / Revised: 27 December 2016 / Accepted: 5 January 2017 / Published: 10 January 2017
View Full-Text   |   Download PDF [4329 KB, uploaded 10 January 2017]   |  

Abstract

In this study, five-component high-entropy alloys (HEAs) AlxCrFeNiV (where x denotes the molar ratio, x = 0, 0.1, 0.3, 0.5, 0.75, 1, and 1.5) were prepared using an arc-melting furnace. The effects of the addition of the Al on the crystal structures were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Also, two non-equiatomic ratio HEAs, AlxCrFeNiV (x = 0.3, and 0.5), were systematically studied through the use of various characterization methods in the as-cast state. The Al0.3CrFeNiV alloy displayed typical duplex body-centered cubic (BCC) structures, including disordered BCC (A2), and NiAl-type ordered BCC (B2) phases. Meanwhile, in regard to the Al0.5CrFeNiV alloy, this alloy was found to contain an unknown phase which was enriched in Cr and V, as well as the coherent A2/B2 phases. Both of these alloys displayed very high yield and fracture strengths. However, their compression fracture strains were approximately 10%. Also, the fracture surfaces showed mainly cleavage fracture modes. View Full-Text
Keywords: high-entropy alloys; microstructure; compressive properties high-entropy alloys; microstructure; compressive properties
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Xia, S.; Yang, X.; Chen, M.; Yang, T.; Zhang, Y. The Al Effects of Co-Free and V-Containing High-Entropy Alloys. Metals 2017, 7, 18.

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