A micromechanical model for polycrystalline shape-memory alloys

2004 ◽  
Vol 378 (1-2) ◽  
pp. 503-506 ◽  
Author(s):  
K. Hackl ◽  
M. Schmidt-Baldassari ◽  
W. Zhang
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Micromechanical Model

Experimental and FEM Analysis of the Fracture Behavior in NiTi Shape Memory Alloys

2006 ◽  
Vol 324-325 ◽  
pp. 919-922 ◽  
Author(s):  
Xin Mei Wang ◽  
Zhu Feng Yue
Keyword(s):  
Fracture Toughness ◽  
Phase Transformation ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Fracture Behavior ◽  
Micromechanical Model ◽  
Crack Tip ◽  
Fem Analysis ◽  
Transformation Behavior ◽  
Niti Shape Memory Alloys

In the present work, the fracture toughness of a NiTi pseudoelastic alloy has been obtained by experiments on CT specimens, which is KIC =39.38MPa·m1/2. Then the stress induced phase transformation behavior in front of the crack tip of the CT specimen is simulated by a micromechanical model considering the different elastic properties between martensite and austenite. The results show that the pre-crack promotes phase transformation at the crack tip. And the phase transformation is localised near the crack tip. It is also shown that phase transformation reduces the Mises stress around the crack tip.

scholarly journals A micromechanical model for single-crystal shape-memory-alloys

PAMM ◽  
2004 ◽  
Vol 4 (1) ◽  
pp. 298-299 ◽  
Author(s):  
Thorsten Bartel ◽  
Klaus Hackl
Keyword(s):  
Shape Memory Alloys ◽  
Single Crystal ◽  
Shape Memory ◽  
Micromechanical Model ◽  
Crystal Shape
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