| Title | Effects of Gradient Annealing on the Microstructure and Rate-Dependent Thermomechanical Behavior of Nanocrystalline NiTi Shape Memory Alloy |
| Author | |
| Corresponding Author | Ren, Fuzeng; Sun, Qingping |
| Publication Years | 2022-10-01
|
| DOI | |
| Source Title | |
| ISSN | 2199-384X
|
| EISSN | 2199-3858
|
| Abstract | A grain size gradient NiTi shape memory alloy, which contains distributed grain sizes within one piece of NiTi sample, would combine superior performances, such as large hysteresis and high fatigue life, high ductility, and strength, due to its gradient structures. This study illustrates the fabrication process, microstructure, and mechanical behavior of both cold-rolled and grain size gradient NiTi. An clear gradient structure has been confirmed by the experiments of this paper. The temperature of the cold-rolled specimen decreases during loading and increases during unloading, which may be mainly caused by the the thermoelastic effect in the linear elastic region and also possible inverse elastocaloric effect (R-B2 phase transition) induced by Ti2Ni and Ni3Ti precipitates. The temperature of the gradient annealed specimen shows a gradient temperature profile, and the temperature decreases slightly followed by an increase during loading, and then decreases and increases during unloading. The main reason for this phenomenon may be the competition among the thermoelastic effect, elastocaloric effect (B2-R phase transition) and inverse elastocaloric effect (R-B2 phase transition) induced by Ti2Ni and Ni3Ti precipitates. |
| Keywords | |
| URL | [Source Record] |
| Indexed By | |
| Language | English
|
| SUSTech Authorship | Corresponding
|
| Funding Project | National Science Foundation of China[52122102]
; Hong Kong Research Grant Council (RGC) through the GRF grant[16239316]
; Project of Hetao Shenzhen-Hong Kong Science and Technology Innovation Cooperation Zone[HZQBKCZYB-2020083]
; Science, Technology and Innovation Commission of Shenzhen Municipality of China[SGDX2019081623360564]
|
| WOS Research Area | Materials Science
|
| WOS Subject | Materials Science, Multidisciplinary
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| WOS Accession No | WOS:000875002600001
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| Publisher | |
| Data Source | Web of Science
|
| Citation statistics |
Cited Times [WOS]:0
|
| Document Type | Journal Article |
| Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/412142 |
| Department | Department of Materials Science and Engineering |
| Affiliation | 1.Hong Kong Univ Sci & Technol, Dept Mech & Aerosp Engn, Hong Kong, Peoples R China 2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China 3.HKUST Shenzhen Hong Kong Collaborat Innovat Res I, Shenzhen 518000, Guangdong, Peoples R China |
| First Author Affilication | Department of Materials Science and Engineering |
| Corresponding Author Affilication | Department of Materials Science and Engineering |
| Recommended Citation GB/T 7714 |
Yan, Kai,Yang, Siyu,Xu, Jiacheng,et al. Effects of Gradient Annealing on the Microstructure and Rate-Dependent Thermomechanical Behavior of Nanocrystalline NiTi Shape Memory Alloy[J]. Shape Memory and Superelasticity,2022.
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| APA |
Yan, Kai,Yang, Siyu,Xu, Jiacheng,Ren, Fuzeng,&Sun, Qingping.(2022).Effects of Gradient Annealing on the Microstructure and Rate-Dependent Thermomechanical Behavior of Nanocrystalline NiTi Shape Memory Alloy.Shape Memory and Superelasticity.
|
| MLA |
Yan, Kai,et al."Effects of Gradient Annealing on the Microstructure and Rate-Dependent Thermomechanical Behavior of Nanocrystalline NiTi Shape Memory Alloy".Shape Memory and Superelasticity (2022).
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