Phase transformations in body-centered cubic NbxHfZrTi high-entropy alloys

被引：41
|
作者：
Zhang, Long [1 ]
Fu, Huameng [1 ,2 ]
Ge, Shaofan [1 ,3 ]
Zhu, Zhengwang [1 ]
Li, Hong [1 ]
Zhang, Hongwei [1 ,4 ]
Wang, Aiming [1 ]
Zhang, Haifeng [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China
[2] Dongguan EONTEC Co Ltd, Dongguan 523662, Guangdong, Peoples R China
[3] Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China
[4] Shenyang Amorphous Met Mfg Co Ltd, Shenyang 110000, Liaoning, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2018年 / 142卷
基金：
中国国家自然科学基金;
关键词：
High-entropy alloy; Phase transformation; Phonon anomaly; TiZrHf-based HEM; MECHANICAL-PROPERTIES; DEFORMATION MECHANISMS; TWINNING BEHAVIOR; TI; DESIGN; PRECIPITATION; OMEGA; BETA; MICROSTRUCTURE; STABILITY;
D O I：
10.1016/j.matchar.2018.06.012
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The stability of body-centered cubic (beta) phases and phase transformations of NbxHfZrTi (x = 1, 0.6, 0.4 and 0.2) high-entropy alloys (HEAs) were investigated. Three types of transformations were observed: the beta -> omega transformation during cooling in Nb0.2 HEA, the deformation-induced beta -> alpha '' and beta -> alpha' transformations in Nb0.4 and Nb0.2 HEAs, respectively. This implies that the phonon anomalies, T(l)1/2(110) and L2/3(111), as the origins of phase transformations in simple Ti, Zr and Hf alloys, also exist in composition-complex TiZrHf-based HEAs. However, the very small fraction of deformation-induced alpha'/alpha '' martensite in fractured Nb0.4 and Nb0.2 suggests a sluggish effect of transformation as compared with simple beta-Ti alloys.
引用
收藏
页码：443 / 448
页数：6
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