Open AccessExperimental Research on Inhibition of temperature to inverse martensitic phase transformation of NiTi Shape Memory Alloy
Author(s) -
Zhile Yang,
Jinlong Liu,
Junqi Lin
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/474/7/072057
Subject(s) - shape memory alloy , materials science , dissipation , austenite , nickel titanium , martensite , amplitude , diffusionless transformation , attenuation , alloy , residual , composite material , metallurgy , thermodynamics , microstructure , optics , mathematics , physics , algorithm
The effects of temperature changes, load cycles, and amplitude changes on the mechanical properties of NiTi shape memory alloys such as the attenuation of energy dissipation capacity, equivalent damping ratio, and residual strain were studied experimentally. Experimental results show that: under different temperature and amplitude, the shape memory alloy achieves stable performance after 10 cycles, and the attenuation of energy dissipation capacity mainly occurs in the first 6 cycles; as the temperature decreases or the number of cycles increases, equivalent damping ratio tends to decrease; When the temperature decreases near the completion temperature of austenite transformation, the residual strain is significantly affected. Even if the strain amplitude is small, residual deformation accumulation will occur, inhibiting the occurrence of reverse martensite transformation, and it is not good for the super-elasticity of SMA.