Features of functional behavior of TiNi shape memory alloy after uniaxial high speed magnetic pulse tension

Abstract

This study investigates the influence of high strain rate on the functional properties of TiNi shape memory alloys. Specimens were deformed in tensile mode using a magnetic pulse loading setup equipped with an optical system to measure the loading time. The technique allows to obtain different strain rates without changing the working part of the specimens, i.e. the residual strains remained the same. The results show that the shape memory effect decreases by 10–25% with increasing strain rate. However, a high strain rate has a positive effect on the two-way shape memory, which increases by 10–25%.

Keywords:

• Shape memory effect
• two-way shape memory
• TiNi alloy
• magnetic pulse tension
• high strain rate

Disclosure statement

The authors declare no conflict of interest.

Additional information

Funding

The reported study was funded by Russian Foundation for Basic Research, project number [19–32-60035].