Formation and Mechanical Behavior of Body-Centered-Cubic Zr(Hf)-Nb-Ti Medium-Entropy Alloys

被引：7

作者：

Wang, Mingkang ^{[1
]}

Yuan, Junhao ^{[1
]}

Yu, Fengyun ^{[1
]}

Wang, Qing ^{[1
]}

Liu, Yufeng ^{[2
]}

Zhang, Zhongwei ^{[3
]}

Dong, Chuang ^{[1
]}

Liaw, Peter K. ^{[4
]}

机构：

[1] Dalian Univ Technol, Sch Mat Sci & Engn, Key Lab Mat Modificat Laser Ion & Elect Beams, Minist Educ, Dalian 116024, Liaoning, Peoples R China

[2] Aerosp Res Inst Mat & Proc Technol, Sci & Technol Adv Funct Composites Lab, Beijing 100076, Peoples R China

[3] Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China

[4] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2021年 / 52卷 / 06期

基金：

中国国家自然科学基金;

关键词：

SHORT-RANGE ORDER; MICROSTRUCTURE; PHASE; PRECIPITATION; NANOPARTICLES; STABILITY; CRCONI;

D O I：

10.1007/s11661-021-06263-z

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：2100 / 2110

页数：11

共 56 条

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