IntroductionShape memory alloys (SMAs) have aroused intense interest due to their unique properties of shape memory effect (SME) and super‐elasticity for the past several decades. Shape memory effect is referred to as the capacity of restoring original shape through heating after apparent permanent deformation of several percent and more. Super‐elasticity means the capacity of reverting to their original shape after deformed by several percent and more and then unloaded, without the requirement of heating. Due to the integration of sensing and actuating, SMAs are considered as “intelligent” materials. As such, the SMAs have drawn significant attention and interest recently in a wide range of applications, such as biomedicine, actuation, energy conversion, aerospace, robotics, civil construction, damping, micro‐electromechanical systems (MEMS), and even fashion field.Ti–Ni SMAs are considered as the most excellent SMAs in the properties since Buehler et al. found their excellent SME in 1963. They not only can recover large strains of 6–8% due to the SME and super‐elasticity, but also have excellent mechanical properties and corrosion‐resistant properties. However, they suffer from high preparation cost due to low cold workability, and thus their large‐scale applications are limited. Consequently, inexpensive SMAs, such as Cu–Al–Ni, Cu–Zn–Al, Cu–Al–Mn, and Fe–Mn–Si‐based alloys, also
Advanced Engineering Materials – Wiley
Published: Jan 1, 2018
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