Phase transformations of nitinol shape memory alloy by varying with annealing heat treatment conditions

Sung Ho Yoon; Dong Jin Yeo

doi:10.1117/12.582381

16 February 2004 Phase transformations of nitinol shape memory alloy by varying with annealing heat treatment conditions

Sung Ho Yoon, Dong Jin Yeo

Author Affiliations +

Proceedings Volume 5648, Smart Materials III; (2004) https://doi.org/10.1117/12.582381
Event: Smart Materials, Nano-, and Micro-Smart Systems, 2004, Sydney, Australia

Abstract

Phase transformations and crystal structures of nitinol shape memory alloy are investigated by varying with heat treatment conditions through DSC (differential scanning calorimetry) and XRD (X-ray diffraction). Heat treatment conditions are considered as heat treated times of 5min, 15min, 30min, and 45min as well as heat treated temperatures of 400°C, 500°C, 525°C, 550°C, 575°C, 600°C, 700°C, 800°C, and 900°C. In addition, tensile tests are conducted to investigate thermomechanical behaviors of nitinol shape memory alloy through material testing system by varying with heat treated temperatures and environmental temperatures. According to these results, heat treatment conditions are found to be significantly affected on phase transformations, crystal structures, and thermomechanical behaviors of nitinol shape memory alloy.

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Sung Ho Yoon and Dong Jin Yeo "Phase transformations of nitinol shape memory alloy by varying with annealing heat treatment conditions", Proc. SPIE 5648, Smart Materials III, (16 February 2004); https://doi.org/10.1117/12.582381

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