Experimental study on whole-life one-way shape memory cyclic degradation and fatigue failure of NiTi shape memory alloy

2020 ◽  
Vol 25 ◽  
pp. 101621
Author(s):  
Tianxing Zhao ◽  
Guozheng Kang ◽  
Chao Yu ◽  
Qianhua Kan
Keyword(s):  
Experimental Study ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Fatigue Failure ◽  
Niti Shape Memory Alloy ◽  
Cyclic Degradation

An Experimental Study on Mechanical Behavior of Superelastic NiTi Shape Memory Alloy Bar Subjected to Torsion

2010 ◽  
Vol 163-167 ◽  
pp. 3992-3995
Author(s):  
Hai Jun Zhou ◽  
Hong Hong Huang ◽  
Hua Zhang
Keyword(s):  
Experimental Study ◽  
Shape Memory Alloy ◽  
Mechanical Behavior ◽  
Shape Memory ◽  
Unit Weight ◽  
Niti Shape Memory Alloy ◽  
Equivalent Damping ◽  
Test Parameters ◽  
Secant Stiffness ◽  
Number Of Cycles

An experimental study on mechanical behavior of superelastic NiTi shape memory alloy (SMA) bar subjected to torsion was made. The SMA specimen was in round bar shape, material phase was austenite and stress mode was torsion. The test was carried out by applying repeated cyclic uniform torsional load. Strain rate, strain amplitude and number of cycles were considered as test parameters. The test was described and analyzed in terms of three fundamental mechanical quantities: secant stiffness, energy loss per unit weight and equivalent damping. The test results show that SMA bar subjected to torsion, have great potential for application in seismic devices due to their considerable superelasticity and stable cyclic behaviors.

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