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Published in: Journal of Materials Engineering and Performance 2/2019

07-01-2019

Improvement of Microstructure and Mechanical Properties of CoCrCuFeNi High-Entropy Alloys By V Addition

Authors: Gang Qin, Shu Wang, Ruirun Chen, Huiting Zheng, Liang Wang, Yanqing Su, Jingjie Guo, Hengzhi Fu

Published in: Journal of Materials Engineering and Performance | Issue 2/2019

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Abstract

V element had positive effect in improving the strength of many alloys, so it was possible that V had potential to strengthen CoCrCuFeNi high-entropy alloys (HEAs) with face-centered cubic (FCC) crystal structure, which was relatively weak in strength and had outstanding ductility. In this paper, we studied the alloying effect of V on the phase evolution, microstructure and the mechanical properties of the (CoCrCuFeNi)100−xVx (x = 0-16, atomic ratio, hereafter in at.%) HEAs systematically. The results showed that V element had capacity to induce sigma phase precipitation. The volume fraction of sigma phase increased from 0 to 12%; the compressive yield stress of (CoCrCuFeNi)100−xVx HEAs increased from 300 to 613 MPa with V content increasing from 0 to 16% (atomic ratio, hereafter in at.%). However, the compression fracture strain decreased from 50 to 28%. V addition was beneficial in improving the strength of CoCrCuFeNi HEA, and the increase in sigma phase volume fraction was the key factor for the improvement of the (CoCrCuFeNi)100−xVx HEAs in yield stress.

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Metadata
Title
Improvement of Microstructure and Mechanical Properties of CoCrCuFeNi High-Entropy Alloys By V Addition
Authors
Gang Qin
Shu Wang
Ruirun Chen
Huiting Zheng
Liang Wang
Yanqing Su
Jingjie Guo
Hengzhi Fu
Publication date
07-01-2019
Publisher
Springer US
Published in
Journal of Materials Engineering and Performance / Issue 2/2019
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-018-3837-1

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