A new strategy to design eutectic high-entropy alloys using simple mixture method

Jiang, Hui; Han, Kaiming; Gao, Xiaoxia; Lu, Yiping; Cao, Zhiqiang; Gao, Michael C.; Hawk, Jeffrey A.; Li, Tingju

doi:10.1016/j.matdes.2018.01.025

A new strategy to design eutectic high-entropy alloys using simple mixture method

Journal Article · Sat Jan 13 00:00:00 EST 2018 · Materials & Design

DOI:https://doi.org/10.1016/j.matdes.2018.01.025· OSTI ID:1455422

Jiang, Hui ^[1]; Han, Kaiming ^[1]; Gao, Xiaoxia ^[1]; ^[1]; Cao, Zhiqiang ^[1]; Gao, Michael C. ^[2]; Hawk, Jeffrey A. ^[3]; Li, Tingju ^[1]

Dalian Univ. of Technology, Dalian (China). Key Lab. of Solidification Control and Digital Preparation Technology (Liaoning Province), School of Materials Science and Engineering
National Energy Technology Lab. (NETL), Albany, OR (United States); AECOM, Albany, OR (United States)
National Energy Technology Lab. (NETL), Albany, OR (United States)

Eutectic high entropy alloys (EHEAs) hold promising industrial application potential, but how to design EHEA compositions remains challenging. In the present work, a simple and effective strategy by combining mixing enthalpy and constituent binary eutectic compositions was proposed to design EHEA compositions. This strategy was then applied to a series of (CoCrFeNi)M_x (M = Nb, Ta, Zr, Hf) HEAs, leading to the discovery of new EHEAs, namely, CoCrFeNiNb_0.45, CoCrFeNiTa_0.4, CoCrFeNiZr_0.55 and CoCrFeNiHf_0.4. The microstructure of these new EHEAs comprised of FCC and Laves phases in the as-cast state. In conclusion, the experimental result shows that this new alloy design strategy can be used to locate new EHEAs effectively.

View Accepted Manuscript (DOE)

Research Organization:: National Energy Technology Laboratory (NETL), Pittsburgh, PA, and Morgantown, WV (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FE0004000

OSTI ID:: 1455422

Alternate ID(s):: OSTI ID: 1734371
OSTI ID: 23096586

Journal Information:: Materials & Design, Journal Name: Materials & Design Journal Issue: C Vol. 142; ISSN 0264-1275

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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