Investigation of shape memory behavior in Cu-based quaternary shape memory alloys

Abstract

In Cu-based shape memory alloys, martensitic transformations occur regularly from the bcc β phase. At high temperature, the irregular β-phase cooling results in a regular transformation of the short-haul cycle and the B2 superstructure. The nearest neighboring structure is formed by cooling and the DO3 structure or the L21 superplastic structure is formed depending on the cooling rate for the structure alloy composition. In practice, it is known that many alloys have shape recalling effect. Among these alloys, most NiTi and Cu-based alloys are of interest. Although Cu-based alloys are susceptible to corrosion, the research on Cu-based alloys has gained intense due to their ease of manufacture and low cost compared to NiTi alloys. Machining equipment and construction tools are particularly preferred areas for shape recall alloys. In addition, biomedical, aviation and many other areas are used.