Investigation on the σ-phase-related equilibria in Cr-Mn-Co system

被引:0
|
作者
Li, Haoge [1 ]
Ruan, Jingjing [1 ]
Ueshima, Nobufumi [1 ]
Oikawa, Katsunari [1 ]
机构
[1] Tohoku Univ, Grad Sch Engn, Dept Met, Sendai, Miyagi 9808579, Japan
关键词
High entropy alloy; Microstructure; Phase diagrams; Isothermal sections; HIGH-ENTROPY ALLOY; MECHANICAL-PROPERTIES; DEBYE-SCHERRER; STABILITY; MULTICOMPONENT; MICROSTRUCTURE; CRMNFECONI; CRITERION; PRECIPITATION; DEFORMATION;
D O I
10.1016/j.jallcom.2021.159024
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The equilibrated microstructures in the Cr-Mn-Co ternary alloys annealed at 900, 1050, 1150, and 1200 degrees C were studied using X-ray diffraction (XRD) and electron probe micro analyzer (EPMA). The results are summarized as follows: (1) the sigma phase has a wide solubility range from Cr-Co side to Cr-Mn side at all temperatures investigated; (2) the sigma phase region becomes narrower as the temperature increases from 900 to 1200 degrees C; (3) The (alpha Co) phase has a significant solubility for Cr which decreases with increasing Mn content; (4) the solubility of Co in the (Cr) phase decreases with the increasing Mn content at all temperatures investigated; (5) the solubility of Cr in the (beta Mn) phase slightly increases as the temperature increases from 900 to 1150 degrees C, while the solubility of Co changes hardly. The experimental information obtained from this study is not only useful for the thermodynamic assessment of the Cr-Mn-Co ternary system, but also significant for the alloy design of high entropy alloy. (C) 2021 Elsevier B.V. All rights reserved.
引用
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页数:8
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