Solid solution island of the Co-Cr-Fe-Ni high entropy alloy system. (1st April 2017)

• Record Type: Journal Article
• Authors: He, Feng; Wang, Zhijun; Wu, Qingfeng; Niu, Sizhe; Li, Junjie; Wang, Jincheng; Liu, C.T.
• Is Part Of: Scripta materialia. Number 131(2017)
• Page Start: 42
• Page End: 46
• Publication Date: 2017-04-01
• Subjects: High entropy alloys -- Design -- Single phase; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.12.033
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Single-phase equiatomic CoCrFeNi high entropy alloy (HEA) is a promising high-entropy base with high tensile ductility and fracture toughness. However, the equal molar fraction of these elements is not a sufficient and necessary condition to obtain a single solid solution with high entropies. Instead, our combination of both calculated phase diagram (CALPHAD) calculations and experimental verifications indicate that the single phase region in the Co-Cr-Fe-Ni HEA system can be extended from a point to a large single phase solid solution island. The significance of this study is that HEAs can be designed with a high design diversity. Graphical abstract: The Co-Cr-Fe-Ni single-phase face cubic centered (fcc) high entropy alloy (HEA) is extended from a single equal-molar point to a large single phase solid solution island by using CALPHAD method together with systemic experimental verifications.