Thermal cycling of stress-induced martensite for high-performance shape memory effect

SCRIPTA MATERIALIA

卷:80

Article

Casati, Riccardo^1,2  Vedani, Maurizio²  Tuissi, Ausonio¹ 

[1] Natl Res Council Italy, Inst Energet & Interphases, CNR IENI, Lecce, Italy

[2] Politecn Milan, Dept Mech Engn, I-20133 Milan, Italy

关键词: Shape memory alloys;    NiTi alloys;    Shape memory actuators;    High-performance shape memory effect;    Stress-induced martensite;   

DOI  :  10.1016/j.scriptamat.2014.02.003

来源: Elsevier

【 摘 要 】

A novel approach to achieve an extraordinary high stress recovery shape memory effect based on thermal cycling of stress-induced martensite is proposed. An alternative thermodynamic path is considered in order to achieve outstanding functional properties of Ni-rich NiTi alloys, which are commonly used at room or body temperature as superelastic materials. Fatigue tests revealed excellent stability of the material subjected to the novel thermomechanical path, confirming its suitability for employment in high-performance shape memory actuators. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free