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- Title
Factors Determining the Maximum Recovery Stress of the Ni<sub>47</sub>Ti<sub>44</sub>Nb<sub>9</sub> Alloy During Constrained Heating.
- Authors
Cao, X. D.; Zhang, Y. H.; Sun, M. Y.; Zhang, S. W.; Wang, Y. Y.; Zhang, J.; Sun, K. H.; Peng, H. B.; Chen, J.; Yang, Q.; Huang, S. K.; Wen, Y. H.; Fan, Q. C.
- Abstract
The maximum recovery stress is an essential parameter for evaluating the reliability of shape-memory alloys. In this study, the factors that determine the maximum recovery stress of the Ni47Ti44Nb9 shape-memory alloy were investigated. Although the recovery stress is generated by the shape recovery during constrained heating, the maximum recovery stress mainly depends on plastic deformation rather than the shape recovery strain. In the present work, because of the softening effect caused by dislocation annihilation and grain coarsening, plastic deformation occurs more easily with the increase in annealing temperature. This results in a sharp decrease in the maximum recovery stress, while the recovery strain remains high.
- Subjects
ALLOYS; MATERIAL plasticity; SHAPE memory alloys
- Publication
Metallurgical & Materials Transactions. Part A, 2022, Vol 53, Issue 3, p893
- ISSN
1073-5623
- Publication type
Article
- DOI
10.1007/s11661-021-06560-7