Realizing superior strength-ductility combination in dual-phase AlFeCoNiV high-entropy alloy through composition and microstructure design

Materials Research Letters

Jianfeng Gu¹  Zhenhua Ye¹  Xudong Yang¹  Chuanwei Li¹  Mengyao Zheng¹  Xinyu Zhang¹  Qing Wang² 

[1] Institute of Materials Modification and Modelling, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, People’s Republic of China;Laboratory for Microstructures, Institute of Materials, Shanghai University, Shanghai, People’s Republic of China;

关键词: High-entropy alloys;    dual-phase microstructure;    strength–ductility trade-off;   

DOI  :  10.1080/21663831.2022.2093140

来源: DOAJ

【 摘 要 】

Achieving high strength and ductility simultaneously in high-entropy alloys (HEAs) has always been a challenge, and recent studies indicate that duplex microstructure provides a strategy to solve this contradiction. We prepared Al0.25FeCoNiV HEA with L12/B2 fine-grain duplex microstructure and achieved a remarkable combination of the ultimate tensile strength (1530 MPa) and ductility (20%), which clearly outperforms other duplex HEAs. Owing to the formation of fine-grain microstructure and the hindrance of the B2 phase, high yield strength has been achieved. Furthermore, the excellent work-hardening ability of the L12 phase and the dispersion of the B2 phase ensured uniform deformation and high strength.

【 授权许可】

Unknown