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*

*この研究の対応する著者

研究成果: Article査読

抄録

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.

本文言語English
論文番号171902
ジャーナルApplied Physics Letters
119
17
DOI
出版ステータスPublished - 2021 10 25

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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