Net-Shape NiTi Shape Memory Alloy by Spark Plasma Sintering Method
Sneha Samal, Orsolya Molnárová, Filip Průša, Jaromı́r Kopeček, Luděk Heller, Petr Šittner, Marcela Škodová, L. Abate, Ignazio Blanco
Abstract
An analysis of the shape memory effect of a NiTi alloy by using the spark plasma sintering approach has been carried out. Spark plasma sintering of Ti50Ni50 powder (20–63 µm) at a temperature of 900 °C produced specimens showing good shape memory effects. However, the sample showed 2.5% porosity due to a load of 48 MPa. Furthermore, an apparent shape memory effect was recorded and the specimens were characterized by uniformity in chemical composition and shape memory alloys of NiTi showed significant austenite phases with a bending strain recovery of >2.5%.
Topics & Concepts
Shape-memory alloySpark plasma sinteringMaterials scienceNickel titaniumAusteniteMetallurgySinteringAlloyPorosityPlasmaComposite materialMicrostructurePhysicsQuantum mechanicsShape Memory Alloy Transformations