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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25 October 2021
Research Article|
October 25 2021
Dimensional stability of a metastable FCC high entropy alloy
Special Collection:
Metastable High Entropy Alloys
Chun-Lin Lin;
Chun-Lin Lin
1
Ph.D. Program in Prospective Functional Materials Industry, National Tsing Hua University
, 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
2
High Entropy Materials Center, National Tsing Hua University
, 101, Sec. 2, Kuang-Fu 10 Road, Hsinchu 30013, Taiwan
3
Department of Materials Science and Engineering, National Tsing Hua University
, 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
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Tso-Wei Chen;
Tso-Wei Chen
1
Ph.D. Program in Prospective Functional Materials Industry, National Tsing Hua University
, 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
3
Department of Materials Science and Engineering, National Tsing Hua University
, 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
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Yao-Jen Chang;
Yao-Jen Chang
1
Ph.D. Program in Prospective Functional Materials Industry, National Tsing Hua University
, 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
2
High Entropy Materials Center, National Tsing Hua University
, 101, Sec. 2, Kuang-Fu 10 Road, Hsinchu 30013, Taiwan
3
Department of Materials Science and Engineering, National Tsing Hua University
, 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
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Hideyuki Murakami
;
Hideyuki Murakami
4
National Institute for Materials Science
, Sengen 1-2-1, Tsukuba, Ibaraki 305-0047, Japan
5
Department of Nanoscience and Nanoengineering, Graduate School of Advanced Science and Engineering, Waseda University
, 3-4-1, Okubo, Shinjuku-ku 169-8555, Japan
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Seiji Mitani
;
Seiji Mitani
4
National Institute for Materials Science
, Sengen 1-2-1, Tsukuba, Ibaraki 305-0047, Japan
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An-Chou Yeh
An-Chou Yeh
a)
1
Ph.D. Program in Prospective Functional Materials Industry, National Tsing Hua University
, 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
2
High Entropy Materials Center, National Tsing Hua University
, 101, Sec. 2, Kuang-Fu 10 Road, Hsinchu 30013, Taiwan
3
Department of Materials Science and Engineering, National Tsing Hua University
, 101, Sec. 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
a)Author to whom correspondence should be addressed: yehac@mx.nthu.edu.tw
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a)Author to whom correspondence should be addressed: yehac@mx.nthu.edu.tw
Note: This paper is part of the APL Special Collection on Metastable High Entropy Alloys.
Appl. Phys. Lett. 119, 171902 (2021)
Article history
Received:
July 24 2021
Accepted:
October 11 2021
Citation
Chun-Lin Lin, Tso-Wei Chen, Yao-Jen Chang, Hideyuki Murakami, Seiji Mitani, An-Chou Yeh; Dimensional stability of a metastable FCC high entropy alloy. Appl. Phys. Lett. 25 October 2021; 119 (17): 171902. https://doi.org/10.1063/5.0064544
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