Dimensional stability of a metastable FCC high entropy alloy

Chun Lin Lin; Tso Wei Chen; Yao Jen Chang; Hideyuki Murakami; Seiji Mitani; An Chou Yeh

doi:10.1063/5.0064544

Dimensional stability of a metastable FCC high entropy alloy

Chun Lin Lin, Tso Wei Chen, Yao Jen Chang, Hideyuki Murakami, Seiji Mitani, An Chou Yeh^*

^*Corresponding author for this work

Graduate School of Advanced Science and Engineering

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

5 Citations (Scopus)

Abstract

In this work, a metastable face-centered cubic High Entropy Alloy (HEA) Fe35.0Co28.7Ni24.8Cr1.1Al1.3V4.5Ti1.2Nb2.8Si0.6 was found to exhibit significantly suppressed thermal expansion coefficient (6.0 ppm/K) and stable Young's modulus over a wide temperature range. Experimental and theoretical analyses suggest that both Invar and Elinvar effects were present; in addition, the metastability of this alloy with respect to the first-order phase transition and the magnetic second-order phase transition led to abrupt changes in thermal expansion behavior. The first-order phase transition was associated with the formation of a plate-like D019 phase. The magnetic second-order phase transition decreased the Invar effect and the Elinvar effect and resulted in a significant magnetic entropy difference (-3.12 J kg-1 K-1) in this HEA of interest.

Original language	English
Article number	171902
Journal	Applied Physics Letters
Volume	119
Issue number	17
DOIs	https://doi.org/10.1063/5.0064544
Publication status	Published - 2021 Oct 25

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Dimensional stability of a metastable FCC high entropy alloy",

abstract = "In this work, a metastable face-centered cubic High Entropy Alloy (HEA) Fe35.0Co28.7Ni24.8Cr1.1Al1.3V4.5Ti1.2Nb2.8Si0.6 was found to exhibit significantly suppressed thermal expansion coefficient (6.0 ppm/K) and stable Young's modulus over a wide temperature range. Experimental and theoretical analyses suggest that both Invar and Elinvar effects were present; in addition, the metastability of this alloy with respect to the first-order phase transition and the magnetic second-order phase transition led to abrupt changes in thermal expansion behavior. The first-order phase transition was associated with the formation of a plate-like D019 phase. The magnetic second-order phase transition decreased the Invar effect and the Elinvar effect and resulted in a significant magnetic entropy difference (-3.12 J kg-1 K-1) in this HEA of interest. ",

author = "Lin, {Chun Lin} and Chen, {Tso Wei} and Chang, {Yao Jen} and Hideyuki Murakami and Seiji Mitani and Yeh, {An Chou}",

note = "Funding Information: Chun-Lin Lin would like to thank NIMS for the provision of the international collaborative graduate program (ICGP) scholarship. This work was supported by NIMS under the International Cooperative Graduate Program, and Ministry of Science and Technology (MOST) in Taiwan under Grant Nos. MOST 110-2221-E-007-020-MY3, MOST 110-2224-E-007-001, and MOST 109-2634-F-007-024; the “High Entropy Materials Center” from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education. Publisher Copyright: {\textcopyright} 2021 Author(s).",

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doi = "10.1063/5.0064544",

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AU - Lin, Chun Lin

AU - Chen, Tso Wei

AU - Chang, Yao Jen

AU - Murakami, Hideyuki

AU - Mitani, Seiji

AU - Yeh, An Chou

N1 - Funding Information: Chun-Lin Lin would like to thank NIMS for the provision of the international collaborative graduate program (ICGP) scholarship. This work was supported by NIMS under the International Cooperative Graduate Program, and Ministry of Science and Technology (MOST) in Taiwan under Grant Nos. MOST 110-2221-E-007-020-MY3, MOST 110-2224-E-007-001, and MOST 109-2634-F-007-024; the “High Entropy Materials Center” from The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project by the Ministry of Education. Publisher Copyright: © 2021 Author(s).

PY - 2021/10/25

Y1 - 2021/10/25

N2 - In this work, a metastable face-centered cubic High Entropy Alloy (HEA) Fe35.0Co28.7Ni24.8Cr1.1Al1.3V4.5Ti1.2Nb2.8Si0.6 was found to exhibit significantly suppressed thermal expansion coefficient (6.0 ppm/K) and stable Young's modulus over a wide temperature range. Experimental and theoretical analyses suggest that both Invar and Elinvar effects were present; in addition, the metastability of this alloy with respect to the first-order phase transition and the magnetic second-order phase transition led to abrupt changes in thermal expansion behavior. The first-order phase transition was associated with the formation of a plate-like D019 phase. The magnetic second-order phase transition decreased the Invar effect and the Elinvar effect and resulted in a significant magnetic entropy difference (-3.12 J kg-1 K-1) in this HEA of interest.

AB - In this work, a metastable face-centered cubic High Entropy Alloy (HEA) Fe35.0Co28.7Ni24.8Cr1.1Al1.3V4.5Ti1.2Nb2.8Si0.6 was found to exhibit significantly suppressed thermal expansion coefficient (6.0 ppm/K) and stable Young's modulus over a wide temperature range. Experimental and theoretical analyses suggest that both Invar and Elinvar effects were present; in addition, the metastability of this alloy with respect to the first-order phase transition and the magnetic second-order phase transition led to abrupt changes in thermal expansion behavior. The first-order phase transition was associated with the formation of a plate-like D019 phase. The magnetic second-order phase transition decreased the Invar effect and the Elinvar effect and resulted in a significant magnetic entropy difference (-3.12 J kg-1 K-1) in this HEA of interest.

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Dimensional stability of a metastable FCC high entropy alloy

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