Computational materials design of a corrosion resistant high entropy alloy for harsh environments

SCRIPTA MATERIALIA

卷:153

Article

Lu, Pin¹  Saal, James E.¹  Olson, Greg B.¹  Li, Tianshu²  Swanson, Orion J.²  Frankel, G. S.²  Gerard, Angela Y.³  Quiambao, Kathleen F.³  Scully, John R.³ 

[1] QuesTek Innovat LLC, 1820 Ridge Ave, Evanston, IL 60201 USA

[2] Ohio State Univ, Fontana Corros Ctr, Columbus, OH 43210 USA

[3] Univ Virginia, Ctr Electrochem Sci & Engn, Charlottesville, VA 22904 USA

关键词: High entropy alloy;    Corrosion;    CALPHAD;    Phase diagram;    Modeling;   

DOI  :  10.1016/j.scriptamat.2018.04.040

来源: Elsevier

【 摘 要 】

The integrated computational materials engineering approach is inherently well suited to explore the vast, multidimensional high entropy alloy (HEA) compositional and processing space, and has been adopted in this work, coupled with empiricism, to the design of highly corrosion resistant HEAs. Using the combination of empirical and computational approaches, three non-equimolar HEA compositions were identified for their predicted ability to form a single-phase structure and to exhibit high corrosion resistance. One of them, Ni38Cr21Fe20Ru13Mo6W2, was successfully synthesized on the lab-scale and homogenized at 1250 degrees C for 120 h. Exceedingly high corrosion resistance of the Ni-rich HEA was demonstrated in electrochemical testing. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free