Computational design and initial corrosion assessment of a series of non-equimolar high entropy alloys

SCRIPTA MATERIALIA

卷:172

Article

Lu, Pin¹  Saal, James E.¹  Olson, Gregory B.¹  Li, Tianshu²  Sahu, Sarita²  Swanson, Orion J.²  Frankel, G. S.²  Gerard, Angela Y.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.2019.07.003

来源: Elsevier

【 摘 要 】

The integrated computational materials engineering approach has been employed to design a series of four single-phase non-equimolar high entropy alloys (HEAs) with systematically varied compositions (Ni38Fe20CrxMn21-0.5xCo21-0.5x with x = 6, 10, 14, and 22) and corrosion behavior. The HEAs were successfully designed, synthesized and confirmed to possess a single-phase FCC structure. Preliminary electrochemical corrosion characterization was conducted to gain fundamental understanding of the effects of HEA composition on corrosion resistance, which will be utilized to develop mechanistic corrosion models that enable the optimal design of corrosion resistant HEA. HEA containing 6 at.% Cr showed indications of passivity at a relatively low Cr content. (C) 2019 Acta Materialia Inc Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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