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

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

doi:10.1002/adma.201701678

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

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Hailong Huang

State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China
Yuan Wu

State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China
Junyang He

State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China
Hui Wang

State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China
Xiongjun Liu

State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China
Ke An

Chemical and Engineering Materials Division Neutron Sciences Directorate Oak Ridge National Laboratory Oak Ridge TN 37831 USA
Wei Wu

Chemical and Engineering Materials Division Neutron Sciences Directorate Oak Ridge National Laboratory Oak Ridge TN 37831 USA
Zhaoping Lu

State Key Laboratory for Advanced Metals and Materials University of Science and Technology Beijing Beijing 100083 China

書誌事項

公開日: 2017-06-07

権利情報

http://onlinelibrary.wiley.com/termsAndConditions#am
http://onlinelibrary.wiley.com/termsAndConditions#vor

DOI

10.1002/adma.201701678

公開者: Wiley

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説明

<jats:p>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. Here, 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. 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.</jats:p>