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

Abstract

(China). He obtained his Ph.D. degree from Harbin Institute of Technology in 1998. His research interest focuses on the development of novel metallic biomaterials (Mg-based, Zn-based, and TiNi-based alloys).

Low-Hysteresis Shape Memory Alloy Scale-Up: DSC, XRD and Microstructure Analysis on Heat-Treated Vacuum Induction Melted Ni-Ti-Cu-Pd Alloys

“…The texture, distribution of grain size and tiny chemical inhomogeneities due to segregation at the grain boundaries are expected to occur on a higher level in comparison to the aforementioned technics, in particular in highly alloyed shape memory alloys [39]. Such effects might contribute to the slightly higher transformation hysteresis of the here-studied alloys than what was achieved in previous works [12]. However, depending on the amount of post-processing, these effects might become insignificant when working the material down to a semi-finished product, inducing reorientation of texture and grain refinement [34].…”

Influence of Cu Concentration on Structure, Mechanical Properties and Corrosion Resistance of Ti–Ni–Cu Shape Memory Alloy Ribbons

“…Where EW is the equivalent weight of the alloy, μ is the density of the alloy in g/cm 3 and i corr is the corrosion current density in µA/cm 2 .…”

Pseudoelasticity of SrNi2P2 Micropillar via Double Lattice Collapse and Expansion

“…Pseudoelastic and shape-memory materials, for instance, NiTi-base or Cu-base systems, are the most widely known crystalline materials that can exhibit a large maximum recoverable strain via reversible structural transition, twinning, and detwinning processes. − When a stimulus, such as heat or a magnetic field, is applied, the deformation-induced structural transition can be reversed, and the sample shape can be restored. If this process occurs spontaneously when an applied load is removed under the application of a stimulus, it is called pseudoelasticity. − Except for only a few cases, − however, shape-memory alloys accumulate permanent damage when the structural transition occurs repeatedly. The irreversible evolution of dislocation structures and the residual transformed phase impedes the shape recovery process and reduces the maximum recoverable strain under repeated loading.…”