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

页码：443 / 448

页数：6

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