Molecular dynamics simulations on one-way shape memory effect of nanocrystalline NiTi shape memory alloy and its cyclic degeneration

2021 ◽  
pp. 106777
Author(s):  
Bing Wang ◽  
Guozheng Kang ◽  
Chao Yu ◽  
Bin Gu ◽  
Weifeng Yuan
Keyword(s):  
Molecular Dynamics ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Molecular Dynamics Simulations ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Niti Shape Memory Alloy ◽  
Dynamics Simulations

Molecular dynamics simulations of the two-way shape-memory effect in NiTi nanowires

2015 ◽  
Vol 1782 ◽  
pp. 35-40
Author(s):  
Prashanth Srinivasan ◽  
Lucia Nicola ◽  
Barend Thijsse ◽  
Angelo Simone
Keyword(s):  
Molecular Dynamics ◽  
Thermal Cycling ◽  
Shape Memory ◽  
Molecular Dynamics Simulations ◽  
Compressive Stress ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Austenitic Phase ◽  
Dependent Behavior ◽  
Dynamics Simulations

ABSTRACTShape memory alloys (SMAs) exist in different phases depending on temperature and stress level. Experimental evidence shows that SMAs oscillate between two shapes during thermal cycling. This phenomenon, known as two-way shape-memory effect, occurs due to a transformation between the austenitic phase and the martensitic phase. The two-way shape-memory behavior is studied here by molecular dynamics simulations in NiTi nanowires of different diameter to understand the effect of loading on the size-dependent behavior. Thermal cycling is performed while holding the system at zero stress and at a fixed compressive stress. At zero stress, the martensite structure formed on cooling depends on the wire diameter. However, when cooling is performed at a sufficiently large constant compressive stress, the formation of a single martensitic variant is observed for all diameters.

415 Fabrication of fine fibers of NiTi shape memory alloy and its shape memory effect

2007 ◽  
Vol 2007.46 (0) ◽  
pp. 123-124
Author(s):  
Makoto KIMATA ◽  
Kenta HASEGAWA ◽  
Hiroyuki KATO ◽  
Kazuaki SASAKI
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Niti Shape Memory Alloy
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