Effect of Heat Treatment on Microstructures and Mechanical Properties of Ti50ni47fe3 Shape Memory Alloy

The effect of annealing temperature on microstructures and mechanical properties of Ti50Ni47Fe3 shape memory alloy was investigated by using cold-rolled Ti50Ni47Fe3 shape memory alloy sheet. The evolution of microstructures, mechanical properties and fracture morphology of Ti50Ni47Fe3 alloy was studied by EBSD, SEM, TEM, Vickers hardness test and tensile testing machine. The results show that the recovery occurs at annealing temperature of 500°C, and the recrystallization occurs at 600°C. Because of the recrystallization, alloy has excellent comprehensive mechanical properties. With the increase of annealing temperature, the quantity and distribution of elliptical Ti2Ni phase particles have almost no specific changes. And with the increase of annealing temperatures, the fracture surface of Ti50Ni47Fe3 alloys becomes flatter.

Keywords: TiNiFe alloy, shape memory alloy, Mechanical properties, Recrystallization, Fracture analysis

Suggested Citation: Suggested Citation

Liu, Shuwei and Li, Yanfeng and Song, Xiaoyun and Yu, Yang and Ye, Wenjun and Hui, Songxiao, Effect of Heat Treatment on Microstructures and Mechanical Properties of Ti50ni47fe3 Shape Memory Alloy. Available at SSRN: https://ssrn.com/abstract=4327838 or http://dx.doi.org/10.2139/ssrn.4327838