Abstract

Shape Memory Alloys (SMA) are functional materials known for their shape memory behavior. They are considered smart materials because they regain their shape through simple heat or mechanical treatments. This entire behavior is linked to reversible martesitic transformation. The progress of this martensitic transformation depends on several parameters, such as the effect of thermal or mechanical treatments. It is in this context that this research was carried out. This work aims to study a martensitic transformation in a single-crystal Cu-16.3wt. Al-2.6wt. Ni shape-memory alloy after different heat and thermo-mechanical treatments. The experimental techniques used were optical microscopy, energy-dispersive X-ray spectroscopy, and Vickers microhardness tests. It has been found that the martensitic transformation and its reverse reaction is achieved by simple heating and cooling, and it is characterized by a double memory effect. Aging treatment has an effect on the hardness and the type of martensite.