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- Title
Development of CoCrFeNiVAl<sub>x</sub> High-Entropy Alloys Based on Solid Solution Strengthening.
- Authors
Ding, Xiaolong; Zhan, Yongzhong; Tang, Hongqun
- Abstract
CoCrFeNiVAlx (x values in molar ratio, x = 0, 0.5, 1.0, 1.5 and 2.0, respectively) high-entropy alloys have been designed and prepared. Microstructure and mechanical properties of the CoCrFeNiVAlx alloys have been studied in as-cast conditions. The fcc (face-centered cubic structure) phase and the σ phase (intermetallic phase) have been observed in the CoCrFeNiV alloy. With the increase of Al content, the alloy structure has a tendency to change to a single stable bcc (body-centered cubic) structure. The effect of solid solution strengthening on the compressive strength of the alloy is more obvious with the addition of Al, which is the most significant in the CoCrFeNiVAl1.5 alloy. This alloy shows good comprehensive mechanical properties, i.e., the compressive strength, plasticity and microhardness reach as high as 2140 MPa, 9.5% and 684.9 HV, respectively. High-performance CoCrFeNiVAlx alloys are worth further study for applications of high-entropy alloys.
- Subjects
SOLUTION strengthening; ALLOYS; COMPRESSIVE strength
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2019, Vol 71, Issue 10, p3473
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-019-03416-9