Phase equilibria of the Co-Cr-Mn ternary system at 700 °C

被引：1
|
作者：
Han, K. [1 ]
Sahara, R. [1 ]
Abe, T. [1 ]
Oikawa, K. [2 ]
Ueshima, N. [2 ]
Ohnuma, I. [1 ]
机构：
[1] Natl Inst Mat Sci NIMS, Res Ctr Struct Mat, Tsukuba 3050047, Japan
[2] Tohoku Univ, Grad Sch Engn, Dept Met, Sendai 9808579, Japan
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2023年 / 965卷
关键词：
C; Phase diagrams; D; Electron emission spectroscopies; X-ray diffraction; HIGH-ENTROPY ALLOY; SIGMA-PHASE; MECHANICAL-PROPERTIES; PRECIPITATION; COBALT; STABILITY; DIAGRAMS; FERRITE;
D O I：
10.1016/j.jallcom.2023.171315
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 isothermal phase diagram of the Co-Cr-Mn ternary system at 700 & DEG;C was experimentally determined via field-emission electron probe microanalysis/wavelength dispersive X-ray spectrometry and electron backscatter diffraction analyses. Three-phase regions of & alpha;Co(para)+ & beta;Mn+ & sigma; and & alpha;Mn+ & beta;Mn+ & sigma; were confirmed via equilibrated microstructures; however, three-phase microstructures related to & alpha;Co(para)+ & epsilon;Co+ & sigma; and & alpha;'+ (Cr)+ & sigma; were not observed in our study. The three-phase region of & alpha;Co(para)+ & epsilon;Co+ & sigma; was estimated to be very narrow because the phase boundaries between the & alpha;Co(para) and & epsilon;Co phases were different within 2 at% for the Co, Cr, and Mn compositions. Furthermore, the & alpha;' phase, presumed to be a nitride, was not observed in the microstructure equilibrated under a strictly controlled high-purity Ar gas (99.999%) atmosphere. The & sigma; phase indicated a wide single-phase region similar to a previous study reported at temperatures between 900 & DEG;C and 1200 & DEG;C. The & alpha;Mn phase, which is stable below 727 & DEG;C in the Cr-Mn binary system and below 900 & DEG;C in the Co-Mn binary system, had a large Co solubility of 9.8 at% in the Co-Cr-Mn ternary system. The composition dependences on the lattice constants of the & sigma; phase in the Co-Cr-Mn ternary system were examined via X-ray diffraction analysis; this analysis showed that the lattice constants a and c changed significantly with increasing Mn composition in the Co and Mn substitution, while the lattice constant of a was constant and c was slightly increased by increasing Mn composition in Cr and Mn substitution. From first-principles calculations, it was deduced that increases or decreases in bonding lengths between the nearest atoms occupying the five sublattice sites were associated with small changes in the lattice constant when Mn replaced Cr. The hardness of the & sigma; phase decreased with increasing c/a, and the hardness in the crystal orientation of (100) was more dependent on the Mn composition than that in the crystal orientation of (001).
引用
收藏
页数：14
相关论文
共 50 条
  • [1] Phase equilibria in the ternary In-Ni-Sn system at 700 °C
    Schmetterer, C.
    Zemanova, A.
    Flandorfer, H.
    Kroupa, A.
    Ipser, H.
    [J]. INTERMETALLICS, 2013, 35 : 90 - 97
  • [2] Phase equilibria in the ternary system Sc−Cr−C at subsolidus temperatures
    L. V. Artyukh
    T. Ya. Velikanova
    S. M. Il'enko
    V. M. Petyukh
    [J]. Powder Metallurgy and Metal Ceramics, 1997, 36 : 133 - 140
  • [3] Thermodynamic and kinetic assessments in Co-Cr-Mn system using diffusion data
    Pendem, Sri Pragna
    Haoge, Li
    Ueshima, Nobufumi
    Oikawa, Katsunari
    Tsukada, Yuhki
    Koyama, Toshiyuki
    [J]. JOURNAL OF MATERIALS SCIENCE, 2023, 58 (38) : 15196 - 15218
  • [4] Experimental determination of the phase equilibria in the Co-Cr-Ta ternary system
    Zhao, C. C.
    Yang, S. Y.
    Liu, X. J.
    Wang, C. P.
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2014, 608 : 118 - 125
  • [5] Experimental Determination of Phase Equilibria in the Co-Cr-V Ternary System
    C. C. Zhao
    Y. Yu
    X. J. Liu
    C. P. Wang
    [J]. Journal of Phase Equilibria and Diffusion, 2012, 33 : 189 - 194
  • [6] Experimental investigation of phase equilibria in the Co-Cr-W ternary system
    Zhang, Xinqiao
    Yang, Shuiyuan
    Zhao, Cancan
    Lu, Yong
    Liu, Xingjun
    Wang, Cuiping
    [J]. INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, 2013, 104 (09) : 836 - 842
  • [7] Experimental Determination of Phase Equilibria in the Co-Cr-V Ternary System
    Zhao, C. C.
    Yu, Y.
    Liu, X. J.
    Wang, C. P.
    [J]. JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION, 2012, 33 (03) : 189 - 194
  • [8] Phase Equilibria of the Al–Cr–Ta Ternary System at 1000 and 1200 °C
    C. P. Wang
    Z. C. Zheng
    S. Y. Yang
    J. J. Han
    Y. Lu
    Y. X. Huang
    J. B. Zhang
    X. J. Liu
    [J]. Journal of Phase Equilibria and Diffusion, 2021, 42 : 107 - 117
  • [9] Phase equilibria investigation of the Al-Ni-Er ternary system at 600 °C and 700 °C
    Zhao, Fenyan
    Zhang, Ligang
    Wang, Hang
    Liu, Libin
    [J]. CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, 2021, 75
  • [10] Phase equilibria of the Ni-Cr-Y ternary system at 900 °C
    Wang, Qiang
    Li, Zhi
    Yu, Wei
    Liu, Yan
    Liu, Ya
    Zhao, Manxiu
    [J]. INTERNATIONAL JOURNAL OF MATERIALS RESEARCH, 2022, 113 (05) : 489 - 495
12345