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

Haoge Li; Jingjing Ruan; Nobufumi Ueshima; Katsunari Oikawa

doi:10.1016/j.jallcom.2021.159024

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

Haoge Li, Jingjing Ruan, Nobufumi Ueshima, Katsunari Oikawa

ENG - Metallurgy

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

The equilibrated microstructures in the Cr-Mn-Co ternary alloys annealed at 900, 1050, 1150, and 1200 °C were studied using X-ray diffraction (XRD) and electron probe micro analyzer (EPMA). The results are summarized as follows: (1) the σ phase has a wide solubility range from Cr-Co side to Cr-Mn side at all temperatures investigated; (2) the σ phase region becomes narrower as the temperature increases from 900 to 1200 ℃; (3) The (αCo) 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 (βMn) phase slightly increases as the temperature increases from 900 to 1150 ℃, 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.

Original language	English
Article number	159024
Journal	Journal of Alloys and Compounds
Volume	867
DOIs	https://doi.org/10.1016/j.jallcom.2021.159024
Publication status	Published - 2021 Jun 25

Keywords

High entropy alloy
Isothermal sections
Microstructure
Phase diagrams

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2021.159024

Cite this

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title = "Investigation on the σ-phase-related equilibria in Cr-Mn-Co system",

abstract = "The equilibrated microstructures in the Cr-Mn-Co ternary alloys annealed at 900, 1050, 1150, and 1200 °C were studied using X-ray diffraction (XRD) and electron probe micro analyzer (EPMA). The results are summarized as follows: (1) the σ phase has a wide solubility range from Cr-Co side to Cr-Mn side at all temperatures investigated; (2) the σ phase region becomes narrower as the temperature increases from 900 to 1200 ℃; (3) The (αCo) 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 (βMn) phase slightly increases as the temperature increases from 900 to 1150 ℃, 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.",

keywords = "High entropy alloy, Isothermal sections, Microstructure, Phase diagrams",

author = "Haoge Li and Jingjing Ruan and Nobufumi Ueshima and Katsunari Oikawa",

note = "Funding Information: This work was supported by a Grant-in-Aid for Scientific Research on Innovative Areas {"}High Entropy Alloys - Science of New Class of Materials Based on Elemental Multiplicity and Heterogeneity{"} ( JSPS KAKENHI Grant Number 18H05454 ). Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2021",

month = jun,

day = "25",

doi = "10.1016/j.jallcom.2021.159024",

language = "English",

volume = "867",

journal = "Journal of Alloys and Compounds",

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publisher = "Elsevier BV",

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TY - JOUR

T1 - Investigation on the σ-phase-related equilibria in Cr-Mn-Co system

AU - Li, Haoge

AU - Ruan, Jingjing

AU - Ueshima, Nobufumi

AU - Oikawa, Katsunari

N1 - Funding Information: This work was supported by a Grant-in-Aid for Scientific Research on Innovative Areas "High Entropy Alloys - Science of New Class of Materials Based on Elemental Multiplicity and Heterogeneity" ( JSPS KAKENHI Grant Number 18H05454 ). Publisher Copyright: © 2021 Elsevier B.V.

PY - 2021/6/25

Y1 - 2021/6/25

N2 - The equilibrated microstructures in the Cr-Mn-Co ternary alloys annealed at 900, 1050, 1150, and 1200 °C were studied using X-ray diffraction (XRD) and electron probe micro analyzer (EPMA). The results are summarized as follows: (1) the σ phase has a wide solubility range from Cr-Co side to Cr-Mn side at all temperatures investigated; (2) the σ phase region becomes narrower as the temperature increases from 900 to 1200 ℃; (3) The (αCo) 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 (βMn) phase slightly increases as the temperature increases from 900 to 1150 ℃, 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.

AB - The equilibrated microstructures in the Cr-Mn-Co ternary alloys annealed at 900, 1050, 1150, and 1200 °C were studied using X-ray diffraction (XRD) and electron probe micro analyzer (EPMA). The results are summarized as follows: (1) the σ phase has a wide solubility range from Cr-Co side to Cr-Mn side at all temperatures investigated; (2) the σ phase region becomes narrower as the temperature increases from 900 to 1200 ℃; (3) The (αCo) 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 (βMn) phase slightly increases as the temperature increases from 900 to 1150 ℃, 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.

KW - High entropy alloy

KW - Isothermal sections

KW - Microstructure

KW - Phase diagrams

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ER -

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

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