A lightweight TiZrV0.5Nb0.3Al0.2 refractory high-entropy alloys with enhanced strength and ductility at low and high strains loading

Yiwen Chen, Jiayi Zheng*, Ziqi Xu, Bo Cheng, Yunkai Li, Jian Zhang*

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

摘要

This study has developed a novel TiZrV0.5Nb0.3Al0.2 alloy, a lightweight refractory high-entropy alloys (RHEAs) with an optimized balance of strength and ductility, suitable for advanced structural applications. This alloy, with a density of ∼5.7 g/cm3, exhibited a single body-centered cubic structure with locally compositional fluctuations, extensive solid solution strengthening, and active multiple slip systems. Rigorous testing of this alloy revealed a tensile yield stress (YS) of 1048 ± 10 MPa, an elongation of 32 ± 3 %, and a specific YS of 184 ± 2 MPa g−1 cm3 at a strain rate of 0.001 s−1, surpassing traditional lightweight alloys. Under dynamic loading conditions (2500-5000 s−1), this alloy possessed the YS of 1800∼2500 MPa, demonstrating high resistance to adiabatic shear failure. Such exceptional mechanical properties highlight the great potential for RHEAs as next-generation lightweight structural alloys.

源语言英语
文章编号147653
期刊Materials Science and Engineering: A
922
DOI
出版状态已出版 - 2月 2025

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引用此

Chen, Y., Zheng, J., Xu, Z., Cheng, B., Li, Y., & Zhang, J. (2025). A lightweight TiZrV0.5Nb0.3Al0.2 refractory high-entropy alloys with enhanced strength and ductility at low and high strains loading. Materials Science and Engineering: A, 922, 文章 147653. https://doi.org/10.1016/j.msea.2024.147653