A crystal plasticity based constitutive model accounting for R phase and two-step phase transition of polycrystalline NiTi shape memory alloys

2020 ◽  
Vol 193-194 ◽  
pp. 503-526
Author(s):  
Ting Zhou ◽  
Chao Yu ◽  
Guozheng Kang ◽  
Qianhua Kan ◽  
Daining Fang
Keyword(s):  
Phase Transition ◽  
Constitutive Model ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Crystal Plasticity ◽  
Niti Shape Memory Alloys

A Three-Phase Constitutive Model for TiNiNb Shape Memory Alloys

2010 ◽  
Vol 97-101 ◽  
pp. 660-666
Author(s):  
Jun Wang ◽  
Zhi Ming Hao ◽  
Ping An Shi ◽  
Shao Rong Yu ◽  
Wei Fen Li
Keyword(s):  
Phase Transition ◽  
Constitutive Model ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Conventional Theory ◽  
Material Parameters ◽  
Three Phase ◽  
The Individual

A three-phase constitutive model for TiNiNb shape memory alloys (SMAs) is proposed based on the fact that TiNiNb SMAs are dynamically composed of austenite, martensite and -Nb phases. In the considered ranges of stress and temperature, the behaviors of austenite, martensite and -Nb phases are assumed to be elastoplastic, and the behavior of an SMA is regarded as the dynamic combination of the individual behavior of each phase. Then a macroscopic constitutive description for TiNiNb SMAs is obtained by the conventional theory of plasticity, the theory of mixture, the theory of inclusion, and the description of phase transition by Tanaka. The method for determination of the material parameters is given. This constitutive model can describe the main characteristics of SMAs, such as ferrcelasticity, pseudoelasticity and shape memory effect.

On phase transition velocities of NiTi shape memory alloys

2010 ◽  
Vol 501 (1) ◽  
pp. 70-76 ◽  
Author(s):  
W.G. Guo ◽  
J. Su ◽  
Y. Su ◽  
S.Y. Chu
Keyword(s):  
Phase Transition ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Niti Shape Memory Alloys
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