Recent Development of TiNi‐Based Shape Memory Alloys with High Cycle Stability and High Transformation Temperature

• Published in: Advanced engineering materials Vol. 22; no. 4
• Main Authors: Tong, Yunxiang, Shuitcev, Aleksandr, Zheng, Yufeng
• Format: Journal Article
• Language: English
• Published: 01.04.2020
• Subjects: functional stability; martensitic transformation; shape memory alloys; TiNi-based alloys
• ISSN: 1438-1656; 1527-2648
• DOI: 10.1002/adem.201900496

TiNi‐based shape memory alloys (SMAs) attract a lot of attention from engineering and biomedical fields because of their superior functional properties, such as their unique shape memory effect, superelasticity, and excellent biocompatibility. Most of the unique properties result from martensitic transformation, which can be thermally induced or stress induced. In recent years, with the development of understanding of martensitic transformation, significant progress has been made and several novel TiNi‐based SMAs have been developed, including alloys with slim hysteresis and stable functional properties and high‐temperature SMAs with extremely large recovery strain and stress. In this work, the most recent developments in TiNi‐based SMAs are presented in terms of a strategy to develop high‐performance alloys with particular microstructures, alloying effects, and functional properties. In past decades, significant progress of TiNi‐based shape memory alloys has been achieved in the directions of ultralow functional fatigue and high‐temperature shape recovery, which may provide opportunities for valuable engineering and biomedical applications. Herein, the current status of the related TiNi‐based alloys is overviewed with an emphasis on the development strategy, alloying effects, and functional properties.