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The Influence of Solution Treatments on the Microstructure, Phase Transformation Behavior, and Superelastic Characteristics of Nitinol Synthesized by Plasma Arc Deposition.
- Source :
- Journal of Materials Engineering & Performance; Apr2020, Vol. 29 Issue 4, p2491-2498, 8p
- Publication Year :
- 2020
-
Abstract
- The aim of this work is to study the effect of solution treatment time on the Ti<subscript>2</subscript>Ni second phase morphology, phase transformations, mechanical properties and superelastic behavior of plasma arc deposited (PAD) nitinols. The results demonstrate that the Ti<subscript>2</subscript>Ni second phases are significantly affected by the solution treatment time. The Ti<subscript>2</subscript>Ni second phase is dissolved into the TiNi matrix phase gradually, and its size and volume fraction also gradually decreases with increasing solution treatment time. Additionally, the solution treatment time exhibits a visible influence on the phase transformation, mechanical properties and superelasticity of the PAD nitinol, but the degree of influence depends on the size, volume fraction and distribution of the Ti<subscript>2</subscript>Ni second phase. With increasing solution treatment time, the phase transformation temperatures gradually increase, and the phase transformation peaks decrease in width and become sharp with a single transformation. Besides, the compressive strength first increases and then decreases, while the plasticity increases with solution treatment time increases from 0 to 8 h. Moreover, the superelastic stability of the PAD nitinol is improves as the solution treatment time increases from 0 to 6 h and then decreases. This phenomenon is closely related to the critical stress for dislocation slip, which depends on the change in the Ti<subscript>2</subscript>Ni second phase. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10599495
- Volume :
- 29
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- Journal of Materials Engineering & Performance
- Publication Type :
- Academic Journal
- Accession number :
- 143039659
- Full Text :
- https://doi.org/10.1007/s11665-020-04802-0