Microstructure, phase stability and properties of CoCr0.5CuxFeyMoNi compositionally complex alloys. Issue 2 (22nd January 2017)

• Record Type: Journal Article
• Authors: Liu, N.; Wu, P. H.; Peng, Z.; Xiang, H. F.; Chen, C.; Wang, X. J.; Zhang, J.
• Is Part Of: Materials science and technology. Volume 33:Issue 2(2017)
• Page Start: 210
• Page End: 214
• Publication Date: 2017-01-22
• Subjects: High-entropy alloys -- Microstructure -- Component phase -- Properties; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2016.1177985
• Languages: English
• ISSNs: 0267-0836

Abstract

Abstract : Liquid-phase separation occurred in CoCrCu x FeMoNi ( x ≥ 0.5) alloys when the mixing entropies are positive in our previous work. So in this work, CoCr0.5 Cu x Fe y MoNi alloys are designed to investigate the microstructure, component phases and properties. FCC and BCC were detected in CoCr0.5 Cu x Fe y MoNi alloys, accompanied with a topologically close-packed μ phase. A parameter, V R, was defined, where V R is the ratio of the volume fraction of BCC plus μ phases and that of FCC phase. The maximum strength and the ductility were obtained at the minimum V R of the alloys, whereas the hardness increased with the increasing V R . It can be presumed that the strange balance between strength, ductility and hardness is an indirect result of the degree of brittle failure.