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Local chemical fluctuation mediated ultra-sluggish martensitic transformation in high-entropy intermetallics

文献类型：期刊论文

作者Wu, Yuan5; Zhang, Fei5; Li, Fengshou5; Yang, Yi5; Zhu, Jiaming4; Wu, Hong-Hui5; Zhang, Yao5; Qu, Ruitao3; Zhang, Zhefeng3; Nie, Zhihua2
刊名MATERIALS HORIZONS
出版日期2021-12-02
页码11
ISSN号2051-6347
DOI10.1039/d1mh01612a
通讯作者Lu, Zhaoping(luzp@ustb.edu.cn)
英文摘要Superelasticity associated with martensitic transformation has found a broad range of engineering applications, such as in low-temperature devices in the aerospace industry. Nevertheless, the narrow working temperature range and strong temperature sensitivity of the first-order phase transformation significantly hinder the usage of smart metallic components in many critical areas. Here, we scrutinized the phase transformation behavior and mechanical properties of multicomponent B2-structured intermetallic compounds. Strikingly, the (TiZrHfCuNi)(83.3)Co-16.7 high-entropy intermetallics (HEIs) show superelasticity with high critical stress over 500 MPa, high fracture strength of over 2700 MPa, and small temperature sensitivity in a wide range of temperatures over 220 K. The complex sublattice occupation in these HEIs facilitates formation of nano-scaled local chemical fluctuation and then elastic confinement, which leads to an ultra-sluggish martensitic transformation. The thermal activation of the martensitic transformation was fully suppressed while the stress activation is severely retarded with an enhanced threshold stress over a wide temperature range. Moreover, the high configurational entropy also results in a small entropy change during phase transformation, consequently giving rise to the low temperature sensitivity of the superelasticity stress. Our findings may provide a new paradigm for the development of advanced superelastic alloys, and shed new insights into understanding of martensitic transformation in general.
资助项目National Natural Science Foundation of China[51871016] ; National Natural Science Foundation of China[52061135207] ; National Natural Science Foundation of China[11790293] ; National Natural Science Foundation of China[51901013] ; National Natural Science Foundation of China[51921001] ; 111 Project[B07003] ; Program for Changjiang Scholars and Innovative Research Team in University of China[IRT_14R05] ; Fundamental Research Funds for the Central Universities ; U.S. Department of Energy, USA, Office of Science, Office of Basic Energy Sciences[DE-AC02-06CH11357]
WOS研究方向Chemistry ; Materials Science
语种英语
WOS记录号WOS:000730298800001
出版者ROYAL SOC CHEMISTRY
资助机构National Natural Science Foundation of China ; 111 Project ; Program for Changjiang Scholars and Innovative Research Team in University of China ; Fundamental Research Funds for the Central Universities ; U.S. Department of Energy, USA, Office of Science, Office of Basic Energy Sciences
源URL[http://ir.imr.ac.cn/handle/321006/167316]  
专题金属研究所_中国科学院金属研究所
通讯作者Lu, Zhaoping
作者单位1.City Univ Hong Kong, Dept Phys, Kowloon, 83 Tat Chee Ave, Hong Kong, Peoples R China
2.Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Lab Fatigue & Fracture Mat, Shenyang 110016, Peoples R China
4.Shandong Univ, Sch Civil Engn, Jinan 250012, Peoples R China
5.Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714		 Wu, Yuan,Zhang, Fei,Li, Fengshou,et al. Local chemical fluctuation mediated ultra-sluggish martensitic transformation in high-entropy intermetallics[J]. MATERIALS HORIZONS,2021:11.
APA Wu, Yuan.,Zhang, Fei.,Li, Fengshou.,Yang, Yi.,Zhu, Jiaming.,...&Lu, Zhaoping.(2021).Local chemical fluctuation mediated ultra-sluggish martensitic transformation in high-entropy intermetallics.MATERIALS HORIZONS,11.
MLA Wu, Yuan,et al."Local chemical fluctuation mediated ultra-sluggish martensitic transformation in high-entropy intermetallics".MATERIALS HORIZONS (2021):11.

入库方式： OAI收割

来源：金属研究所

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