Phase-Transformation Ductilization of Brittle High-Entropy Alloys via Metastability Engineering

Huang, Hailong; Wu, Yuan; He, Junyang; Wang, Hui; Liu, Xiongjun; An, Ke; Wu, Wei; Lu, Zhaoping

doi:10.1002/adma.201701678

Title: Phase-Transformation Ductilization of Brittle High-Entropy Alloys via Metastability Engineering

Journal Article · Wed Jun 07 00:00:00 EDT 2017 · Advanced Materials

DOI:https://doi.org/10.1002/adma.201701678· OSTI ID:1364323

Huang, Hailong ^[1]; Wu, Yuan ^[1]; He, Junyang ^[1]; Wang, Hui ^[1]; Liu, Xiongjun ^[1]; An, Ke ^[2]; Wu, Wei ^[2]; Lu, Zhaoping ^[1]

Univ. of Science and Technology Beijing (China). State Key Lab. for Advanced Metals and Materials
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Sciences Directorate. Chemical and Engineering Materials Division

High-entropy alloys (HEAs) in which interesting physical, chemical, and structural properties are being continuously revealed have recently attracted extensive attention. Body-centered cubic (bcc) HEAs, particularly those based on refractory elements are promising for high-temperature application but generally fail by early cracking with limited plasticity at room temperature, which limits their malleability and widespread uses. In this paper, the “metastability-engineering” strategy is exploited in brittle bcc HEAs via tailoring the stability of the constituent phases, and transformation-induced ductility and work-hardening capability are successfully achieved. Finally, this not only sheds new insights on the development of HEAs with excellent combination of strength and ductility, but also has great implications on overcoming the long-standing strength–ductility tradeoff of metallic materials in general.

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Research Organization:: University of Science and Technology Beijing (China); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC); International S&T Cooperation Program of China; Program for Changjiang Scholars and Innovative Research Team in University (China); Fundamental Research Fund for the Central Universities (China)

Grant/Contract Number:: AC05-00OR22725; 51531001; 51671018; 51422101; 51371003; B07003; 2015DFG52600; IRT_14R05; FRF-TP-15-004C1

OSTI ID:: 1364323

Alternate ID(s):: OSTI ID: 1374089

Journal Information:: Advanced Materials, Vol. 29, Issue 30; ISSN 0935-9648

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 384 works

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36 MATERIALS SCIENCE
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