期刊
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
卷 52, 期 6, 页码 2100-2110出版社
SPRINGER
DOI: 10.1007/s11661-021-06263-z
关键词
-
资金
- National Program on Key Basic Research Project of China [2020-JCJQ-ZD-157]
- National Natural Science Foundation of China [91860108, U1867201]
- Fundamental Research Funds for the Central Universities [DUT19LAB01]
This study investigated the formation and mechanical behavior of BCC Zr(Hf)-Nb-Ti medium entropy alloys, demonstrating the enhancement of BCC-beta structural stability with increasing Nb content and the improvement in mechanical properties with appropriate Ti and Hf/Ti additions. The designed alloys exhibited excellent mechanical properties, showing higher yield strength, larger elongation to fraction, and lower Young's modulus.
The present work investigated the formation and mechanical behavior of body-centered-cubic (BCC) Zr(Hf)-Nb-Ti medium entropy alloys (MEAs), in which three series of alloys, [Zr-Zr-14](Zr,Nb)(3), [Ti-Zr-14](Ti,Nb)(3), and [Ti-(Hf,Zr)(14)](Nb)(3), were designed by the cluster formula approach. With increasing the Nb content, the BCC-beta structural stability of the [Zr-Zr-14](Zr,Nb)(3) alloys would be enhanced, as evidenced by the BCC [Zr-Zr-14](Nb)(3) (Zr83.33Nb16.67 in atomic percent at. pct) alloy containing a minor amount of omega phase. An appropriate content of Ti addition can further improve the BCC-beta stability of [Ti-Zr-14](Nb-3) (Zr77.77Ti5.56Nb16.67) alloy without any omega precipitation. The further substitution of Hf/Ti for the Zr could also render the [Ti-Zr8Hf4Ti2](Nb-3) (Zr-44.44 Hf22.22Ti16.67Nb16.67) alloy with a single BCC structure. All these BCC MEAs exhibit prominent mechanical properties, as exemplified by the [Ti-Zr8Hf6](Nb-3) (Zr44.44Hf33.33Ti5.56Nb16.67) with a higher yield strength of 662 MPa, a larger elongation to fraction of 15.2 pct, and a lower Young's modulus of 71 GPa.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据