The effect of tensile deformation on the damping capacity of NiTi shape memory alloy

2016 ◽  
Vol 679 ◽  
pp. 260-267 ◽  
Author(s):  
K.C. Atli
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Tensile Deformation ◽  
Niti Shape Memory Alloy ◽  
Damping Capacity

Rate-Dependent Damping Capacity of NiTi Shape Memory Alloy

2011 ◽  
Vol 172-174 ◽  
pp. 37-42 ◽  
Author(s):  
Yong Jun He ◽  
Qing Ping Sun
Keyword(s):  
Shape Memory Alloy ◽  
Strain Rate ◽  
Shape Memory ◽  
Strain Curve ◽  
Tensile Loading ◽  
Niti Shape Memory Alloy ◽  
Damping Capacity ◽  
Environmental Condition ◽  
Mechanical Coupling ◽  
Rate Dependent

High damping capacity is one of the prominent properties of NiTi shape memory alloy (SMA), having applications in many engineering devices to reduce unwanted vibrations. Recent experiments demonstrated that, the hysteresis loop of the stress-strain curve of a NiTi strip/wire under a tensile loading-unloading cycle changed non-monotonically with the loading rate, i.e., a maximum damping capacity was obtained at an intermediate strain rate (ε.critical). This rate dependence is due to the coupling between the temperature dependence of material’s transformation stresses, latent-heat release/absorption in the forward/reverse phase transition and the associated heat exchange between the specimen and the environment. In this paper, a simple analytical model was developed to quantify these thermo-mechanical coupling effects on the damping capacity of the NiTi strips/wires under the tensile loading-unloading cycle. We found that, besides the material thermal/mechanical properties and specimen geometry, environmental condition also affects the damping capacity; and the critical strain rate ε.criticalfor achieving a maximum damping capacity can be changed by varying the environmental condition. The theoretical predictions agree quantitatively with the experiments.

Recoverability of large strains and deformation twinning in martensite during tensile deformation of NiTi shape memory alloy polycrystals

2019 ◽  
Vol 180 ◽  
pp. 243-259 ◽  
Author(s):  
Yuchen Chen ◽  
Orsolya Molnárová ◽  
Ondřej Tyc ◽  
Lukáš Kadeřávek ◽  
Luděk Heller ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Tensile Deformation ◽  
Deformation Twinning ◽  
Niti Shape Memory Alloy ◽  
Large Strains

Impact protection behavior of NiTi shape memory alloy wires

2017 ◽  
Vol 700 ◽  
pp. 132-139 ◽  
Author(s):  
Chuanliang Shen ◽  
Zhipeng Wu ◽  
Zhenhai Gao ◽  
Xiaoyu Ma ◽  
Shengtong Qiu ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Niti Shape Memory Alloy ◽  
Impact Protection

Superelasticity preservation in dissimilar joint of NiTi shape memory alloy to biomedical PtIr

Materialia ◽  
2021 ◽  
pp. 101090
Author(s):  
A. Shamsolhodaei ◽  
J.P. Oliveira ◽  
B. Panton ◽  
B. Ballesteros ◽  
N. Schell ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Dissimilar Joint ◽  
Niti Shape Memory Alloy
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