Thermomechanical investigations of martensitic and reverse transformations in TiNi shape memory alloy

摘要: Shape memory alloys are characterised by interesting properties, i.e. shape effect and pseudoelasticity, which enable their increasing application. Thermomechanical aspects of martensitic reverse transformations in TiNi alloy subjected to tension tests were investigated. The stress-strain characteristics obtained during the completed temperature characteristics. changes calculated on basis thermograms determined an infrared camera. Taking advantages from technique, distributions specimen’s surface found. Heterogeneous distributions, related nucleation development new martensite phase, registered analysed. A significant increase, up 30 K, was transformation. similar effects heterogeneous distribution observed unloading, while transformation, into austenite took place, accompanied decrease.