Study on a NiTiHfTa shape memory alloy with high-pressure torsion and subsequent annealing

Jintao Zhang; Peng Hu; Shibo Wang; Yu Zhang; Yi Huang; Hua Ding

doi:10.1117/12.3007104

25 October 2023 Study on a NiTiHfTa shape memory alloy with high-pressure torsion and subsequent annealing

Jintao Zhang, Peng Hu, Shibo Wang, Yu Zhang, Yi Huang, Hua Ding

Proceedings Volume 12801, Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023); 1280115 (2023) https://doi.org/10.1117/12.3007104
Event: Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023), 2023, Dalian, China

Abstract

An alloy with the composition of 49.6Ni-35.4Ti-9Hf-6Ta (at%) was processed by high-pressure torsion (HPT) and post-HPT annealing treatment. The microhardness of HPT-processed samples increased obviously, and amorphous feature appeared in 2 turns sample. The microhardness further increased and amorhozation was enhanced in 16 turns sample. After annealing at 750 ℃ for 3h, almost full crystallization occurs in 16 turns sample. In-situ high temperature X-ray diffraction experiment reveals that martensite to austenite transformation took place, indicating the alloy would exhibit SMA effect.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Jintao Zhang, Peng Hu, Shibo Wang, Yu Zhang, Yi Huang, and Hua Ding "Study on a NiTiHfTa shape memory alloy with high-pressure torsion and subsequent annealing", Proc. SPIE 12801, Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023), 1280115 (25 October 2023); https://doi.org/10.1117/12.3007104

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