The effect of temperature on low-cycle fatigue of shape memory alloy

Frattura ed Integrità Strutturale

Denys Baran¹  Petro Yasniy¹  Anna Rudawska²  Volodymyr Iasnii³ 

[1] Faculty of Engineering of Machines, Structures and Technologies, Ternopil Ivan Puluj National Technical University, Ternopil, Ukraine;Faculty of Mechanical Engineering, Lublin University of Technology, Lublin, Poland;Ternopil Ivan Puluj National Technical University;

关键词: NiTi alloy;    Low-cycle fatigue;    Odqvist’s parameter;    Dissipated energy.;    Pseudoelasticity;   

DOI  :  

来源: DOAJ

【 摘 要 】

The influence of temperature on the fatigue properties of pseudoelastic NiTi under low-cycle fatigue are investigated. Tests were performed under the uniaxial tensile deformation (pull-pull) at 0°С and 20°С which is above the austenite finish temperature. Experimental results indicate that the fatigue life of NiTi alloy increases with the decrease of test temperature from 20°С to 0°С in the case of presenting the results depending on the strain range and Odqvist’s parameter. Regardless the test temperature, with the increase of number of cycles to failure, the stress and strain ranges, as well as the dissipation energy decrease, and the total dissipation energy and Odqvist’s parameter increase. The slope of the fatigue curves of NiTi alloy is greater at the temperature of 0°С in comparison with the 20°С in the case of employing the stress range, strain range, Odqvist’s parameter, and total dissipation energy as the failure criteria, and is less while employing the dissipation energy as the failure criterion.

【 授权许可】

Unknown