Deformation-induced phase transformation of Co20Cr26Fe20Mn20Ni14 high-entropy alloy during high-pressure torsion at 77 K

Jongun Moon; Yuanshen Qi; Elena Tabachnikova; Yuri Estrin; Won Mi Choi; Soo Hyun Joo; Byeong Joo Lee; Aleksey Podolskiy; Mikhail Tikhonovsky; Hyoung Seop Kim

doi:10.1016/j.matlet.2017.05.065

Deformation-induced phase transformation of Co₂₀Cr₂₆Fe₂₀Mn₂₀Ni₁₄ high-entropy alloy during high-pressure torsion at 77 K

Jongun Moon, Yuanshen Qi, Elena Tabachnikova, Yuri Estrin, Won Mi Choi, Soo Hyun Joo, Byeong Joo Lee, Aleksey Podolskiy, Mikhail Tikhonovsky, Hyoung Seop Kim^*

^*Corresponding author for this work

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

53 Scopus citations

Abstract

A deformation-induced phase transformation in a face-centered cubic (FCC) Co₂₀Cr₂₆Fe₂₀Mn₂₀Ni₁₄ high-entropy alloy during cryogenic high-pressure torsion (HPT) discovered in this work is reported. Thermodynamic calculations prove that in the Co₂₀Cr₂₆Fe₂₀Mn₂₀Ni₁₄ alloy, a hexagonal close-packed (HCP) phase is stable at low temperatures. Microstructural and compositional analyses suggest that a diffusionless deformation-induced FCC-to-HCP phase transformation occurred during cryogenic HPT.

Original language	English
Pages (from-to)	86-88
Number of pages	3
Journal	Materials Letters
Volume	202
DOIs	https://doi.org/10.1016/j.matlet.2017.05.065
State	Published - 1 Sep 2017
Externally published	Yes

Keywords

High-entropy alloy
High-pressure torsion
Metals and alloys
Microstructure
Phase transformation

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10.1016/j.matlet.2017.05.065

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title = "Deformation-induced phase transformation of Co20Cr26Fe20Mn20Ni14 high-entropy alloy during high-pressure torsion at 77 K",

abstract = "A deformation-induced phase transformation in a face-centered cubic (FCC) Co20Cr26Fe20Mn20Ni14 high-entropy alloy during cryogenic high-pressure torsion (HPT) discovered in this work is reported. Thermodynamic calculations prove that in the Co20Cr26Fe20Mn20Ni14 alloy, a hexagonal close-packed (HCP) phase is stable at low temperatures. Microstructural and compositional analyses suggest that a diffusionless deformation-induced FCC-to-HCP phase transformation occurred during cryogenic HPT.",

keywords = "High-entropy alloy, High-pressure torsion, Metals and alloys, Microstructure, Phase transformation",

author = "Jongun Moon and Yuanshen Qi and Elena Tabachnikova and Yuri Estrin and Choi, {Won Mi} and Joo, {Soo Hyun} and Lee, {Byeong Joo} and Aleksey Podolskiy and Mikhail Tikhonovsky and Kim, {Hyoung Seop}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier B.V.",

year = "2017",

month = sep,

day = "1",

doi = "10.1016/j.matlet.2017.05.065",

language = "英语",

volume = "202",

pages = "86--88",

journal = "Materials Letters",

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publisher = "Elsevier",

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TY - JOUR

T1 - Deformation-induced phase transformation of Co20Cr26Fe20Mn20Ni14 high-entropy alloy during high-pressure torsion at 77 K

AU - Moon, Jongun

AU - Qi, Yuanshen

AU - Tabachnikova, Elena

AU - Estrin, Yuri

AU - Choi, Won Mi

AU - Joo, Soo Hyun

AU - Lee, Byeong Joo

AU - Podolskiy, Aleksey

AU - Tikhonovsky, Mikhail

AU - Kim, Hyoung Seop

PY - 2017/9/1

Y1 - 2017/9/1

N2 - A deformation-induced phase transformation in a face-centered cubic (FCC) Co20Cr26Fe20Mn20Ni14 high-entropy alloy during cryogenic high-pressure torsion (HPT) discovered in this work is reported. Thermodynamic calculations prove that in the Co20Cr26Fe20Mn20Ni14 alloy, a hexagonal close-packed (HCP) phase is stable at low temperatures. Microstructural and compositional analyses suggest that a diffusionless deformation-induced FCC-to-HCP phase transformation occurred during cryogenic HPT.

AB - A deformation-induced phase transformation in a face-centered cubic (FCC) Co20Cr26Fe20Mn20Ni14 high-entropy alloy during cryogenic high-pressure torsion (HPT) discovered in this work is reported. Thermodynamic calculations prove that in the Co20Cr26Fe20Mn20Ni14 alloy, a hexagonal close-packed (HCP) phase is stable at low temperatures. Microstructural and compositional analyses suggest that a diffusionless deformation-induced FCC-to-HCP phase transformation occurred during cryogenic HPT.

KW - High-entropy alloy

KW - High-pressure torsion

KW - Metals and alloys

KW - Microstructure

KW - Phase transformation

UR - http://www.scopus.com/inward/record.url?scp=85019893107&partnerID=8YFLogxK

U2 - 10.1016/j.matlet.2017.05.065

DO - 10.1016/j.matlet.2017.05.065

M3 - 文章

AN - SCOPUS:85019893107

SN - 0167-577X

VL - 202

SP - 86

EP - 88

JO - Materials Letters

JF - Materials Letters

ER -

Deformation-induced phase transformation of Co₂₀Cr₂₆Fe₂₀Mn₂₀Ni₁₄ high-entropy alloy during high-pressure torsion at 77 K

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Keywords

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