Tensile Response of As-Cast CoCrFeNi and CoCrFeMnNi High-Entropy Alloys

Tu Ngoc Lam; Mao Yuan Luo; Takuro Kawasaki; Stefanus Harjo; Jayant Jain; Soo Yeol Lee; An Chou Yeh; E. Wen Huang

doi:10.3390/cryst12020157

Tensile Response of As-Cast CoCrFeNi and CoCrFeMnNi High-Entropy Alloys

Tu Ngoc Lam^*, Mao Yuan Luo, Takuro Kawasaki, Stefanus Harjo, Jayant Jain, Soo Yeol Lee, An Chou Yeh, E. Wen Huang

^*Corresponding author for this work

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

15 Scopus citations

Abstract

In this research, we systematically investigated equiatomic CoCrFeNi and CoCrFeMnNi high-entropy alloys (HEAs). Both of these HEA systems are single-phase, face-centered-cubic (FCC) structures. Specifically, we examined the tensile response in as-cast quaternary CoCrFeNi and quinary CoCrFeMnNi HEAs at room temperature. Compared to CoCrFeNi HEA, the elongation of CoCrFeMnNi HEA was 14% lower, but the yield strength and ultimate tensile strength were increased by 17% and 6%, respectively. The direct real-time evolution of structural defects during uniaxial straining was acquired via in situ neutron-diffraction measurements. The dominant microstructures underlying plastic deformation mechanisms at each deformation stage in as-cast CoCrFeNi and CoCrFeMnNi HEAs were revealed using the Convolutional Multiple Whole Profile (CMWP) software for peak-profile fitting. The possible mechanisms are reported.

Original language	English
Article number	157
Journal	Crystals
Volume	12
Issue number	2
DOIs	https://doi.org/10.3390/cryst12020157
State	Published - Feb 2022

Keywords

Deformation twins
High-entropy alloy
In situ neutron-diffraction
Tensile property

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title = "Tensile Response of As-Cast CoCrFeNi and CoCrFeMnNi High-Entropy Alloys",

abstract = "In this research, we systematically investigated equiatomic CoCrFeNi and CoCrFeMnNi high-entropy alloys (HEAs). Both of these HEA systems are single-phase, face-centered-cubic (FCC) structures. Specifically, we examined the tensile response in as-cast quaternary CoCrFeNi and quinary CoCrFeMnNi HEAs at room temperature. Compared to CoCrFeNi HEA, the elongation of CoCrFeMnNi HEA was 14% lower, but the yield strength and ultimate tensile strength were increased by 17% and 6%, respectively. The direct real-time evolution of structural defects during uniaxial straining was acquired via in situ neutron-diffraction measurements. The dominant microstructures underlying plastic deformation mechanisms at each deformation stage in as-cast CoCrFeNi and CoCrFeMnNi HEAs were revealed using the Convolutional Multiple Whole Profile (CMWP) software for peak-profile fitting. The possible mechanisms are reported.",

keywords = "Deformation twins, High-entropy alloy, In situ neutron-diffraction, Tensile property",

author = "Lam, {Tu Ngoc} and Luo, {Mao Yuan} and Takuro Kawasaki and Stefanus Harjo and Jayant Jain and Lee, {Soo Yeol} and Yeh, {An Chou} and Huang, {E. Wen}",

note = "Publisher Copyright: {\textcopyright} 2022 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2022",

month = feb,

doi = "10.3390/cryst12020157",

language = "English",

volume = "12",

journal = "Crystals",

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AU - Lam, Tu Ngoc

AU - Luo, Mao Yuan

AU - Kawasaki, Takuro

AU - Harjo, Stefanus

AU - Jain, Jayant

AU - Lee, Soo Yeol

AU - Yeh, An Chou

AU - Huang, E. Wen

PY - 2022/2

Y1 - 2022/2

N2 - In this research, we systematically investigated equiatomic CoCrFeNi and CoCrFeMnNi high-entropy alloys (HEAs). Both of these HEA systems are single-phase, face-centered-cubic (FCC) structures. Specifically, we examined the tensile response in as-cast quaternary CoCrFeNi and quinary CoCrFeMnNi HEAs at room temperature. Compared to CoCrFeNi HEA, the elongation of CoCrFeMnNi HEA was 14% lower, but the yield strength and ultimate tensile strength were increased by 17% and 6%, respectively. The direct real-time evolution of structural defects during uniaxial straining was acquired via in situ neutron-diffraction measurements. The dominant microstructures underlying plastic deformation mechanisms at each deformation stage in as-cast CoCrFeNi and CoCrFeMnNi HEAs were revealed using the Convolutional Multiple Whole Profile (CMWP) software for peak-profile fitting. The possible mechanisms are reported.

AB - In this research, we systematically investigated equiatomic CoCrFeNi and CoCrFeMnNi high-entropy alloys (HEAs). Both of these HEA systems are single-phase, face-centered-cubic (FCC) structures. Specifically, we examined the tensile response in as-cast quaternary CoCrFeNi and quinary CoCrFeMnNi HEAs at room temperature. Compared to CoCrFeNi HEA, the elongation of CoCrFeMnNi HEA was 14% lower, but the yield strength and ultimate tensile strength were increased by 17% and 6%, respectively. The direct real-time evolution of structural defects during uniaxial straining was acquired via in situ neutron-diffraction measurements. The dominant microstructures underlying plastic deformation mechanisms at each deformation stage in as-cast CoCrFeNi and CoCrFeMnNi HEAs were revealed using the Convolutional Multiple Whole Profile (CMWP) software for peak-profile fitting. The possible mechanisms are reported.

KW - Deformation twins

KW - High-entropy alloy

KW - In situ neutron-diffraction

KW - Tensile property

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DO - 10.3390/cryst12020157

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SN - 2073-4352

VL - 12

JO - Crystals

JF - Crystals

IS - 2

M1 - 157

ER -

Tensile Response of As-Cast CoCrFeNi and CoCrFeMnNi High-Entropy Alloys

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Keywords

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