Microstructure, martensitic transformation and excellent shape memory effect of Ga-alloyed Cu–Al–Mn–Fe shape-memory single crystal

Journal of Science: Advanced Materials and Devices

Laisen Wang¹  Shen Hong¹  Shuaishuai Chen²  Jinbin Zhang²  Shuiyuan Yang²  Zhongliang Su³  Cuiping Wang³  Shiwei Zheng³ 

[1] Fujian Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005, PR China;Shenzhen Research Institute of Xiamen University, Shenzhen 518055, PR China;College of Materials of Xiamen University, Xiamen 361005, PR China;

关键词: Cu-based shape memory alloy;    Single crystal;    Microstructure;    Martensitic transformation;    Shape memory effect;   

DOI  :  

来源: DOAJ

【 摘 要 】

A Cu–10Al–6Mn–3Fe–4Ga (wt.%) single crystal was simply prepared, and its microstructure, reversible martensitic transformation, mechanical and SME properties were investigated. The results show that this single crystal consists of dominant 2H martensite retained L21 parent and fine Fe-rich nanoparticles. Its reversible martensitic transformation temperatures are respectively 313 K (Ms), 299 K (Mf), 339 K (As), and 354 K (Af), which are suitable for practical applications. A large stress platform with a strain of approximately 8% was associated with the reorientation of existing martensite and stabilization of stress-induced martensite. Furthermore, full shape recovery characteristics are obtained all the time while changing the pre-strains from 6% to 11%. The maximum shape memory effect is up to 9.2% with a 100% shape recovery rate.

【 授权许可】

Unknown