Additive manufacturing of Ni-free Ti-based shape memory alloys: A review

Abstract

Ni-free Ti-based Shape Memory Alloys composed of non-toxic elements have been studied as promising candidates for biomedical applications. However, high tool wear makes them complex to manufacture with conventional techniques. In this way, Additive Manufacturing technologies allow to fabricate complex three-dimensional structures overcoming their poor workability. Control of composition, porosity, microstructure, texture and processing are the key challenges for developing Ni-free Ti-based Shape Memory Alloys. This article reviews various studies conducted on the Additive Manufacturing of Ni-free Ti-based shape memory alloys, including their processing, microstructures and properties.

Keywords: Additive manufacturing (AM); Ni-free; Shape memory alloys (SMA); Shape memory effect (SME); Superelasticity (SE); Ti alloys.