In-situ synchrotron X-ray diffraction investigation on deformation behavior of Nb/NiTi composite during pre-straining process
- Jiangnan University, Zhenjiang (China)
- Seoul National University (Korea, Republic of)
- Jiangnan University, Zhenjiang (China); Youke Publishing Co., Ltd., Beijing (China)
- China University of Mining and Technology, Xuzhou, Jiangsu (China)
- Beihang University, Beijing (China)
The mechanisms responsible for deformation behavior in Nb/NiTi composite during pre-straining were investigated systematically using in-situ synchrotron X-ray diffraction, transmission electron microscopy and tensile test. It is shown that upon loading, the composite experiences elastic elongation and slight plastic deformation of B19', B2 and β-Nb phases, together with the forward stress-induced martensitic (SIM) transformation from B2 to B19'. Upon unloading, the deformation mechanisms of the composite mainly involve elastic recovery of B19', B2 and β-Nb phases, compression deformation of β-Nb phase and incomplete B19'→B2 reverse SIM transformation. In the tensile loading-unloading procedure, besides the inherent elastic deformation and SIM transformation, the (001) compound twins in B19' martensite can also be conducive to the elastic deformation occurring in B19'-phase of the composite. Therefore, this composite can exhibit a large recoverable strain after unloading owing to the elastic deformation, and the partially reversible and consecutive SIM transformation together with the (001) compound twins.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC); Six Talent Peaks Project in Jiangsu Province; Zhenjiang Science & Technology Program; Jiangsu University
- Grant/Contract Number:
- AC02-06CH11357; 51771082; 51971009; 52175410; 51801076; 2019-XCL-113; GY2020001; NZXB20200101
- OSTI ID:
- 1981801
- Journal Information:
- Transactions of the Nonferrous Metals Society of China, Vol. 32, Issue 8; ISSN 1003-6326
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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