Role of brittle sigma phase in cryogenic-temperature-strength improvement of non-equi-atomic Fe-rich VCrMnFeCoNi high entropy alloys

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 724; pp. 403 - 410
• Main Authors: Jo, Yong Hee, Choi, Won-Mi, Sohn, Seok Su, Kim, Hyoung Seop, Lee, Byeong-Joo, Lee, Sunghak
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 02.05.2018; Elsevier BV
• Subjects: Alloys; Cryogenic; Cryogenic temperature; Ductility; Grain boundaries; Grain refinement; High entropy alloy; High entropy alloys; Iron; Mechanical property; Microstructure; Sigma phase; Tensile properties; Tensile strength; Thermodynamic calculation; Twinning; Cryogenic; Sigma phase; High entropy alloy; Thermodynamic calculation; Mechanical property

An equi-atomic single-fcc-phase CrMnFeCoNi high entropy alloy (HEA) shows much higher tensile properties at cryogenic temperature than at room temperature because of its fcc characteristics and abundant twinning at cryogenic temperature. In order to further improve the cryogenic-temperature tensile...