u/Green-Respect-4244

That’s a Cu-Sn-Mn-Si-Ce alloy that shows good shape recovery.
It has a relatively simple composition in which Mn and Si help stabilize the beta phase in the Cu-Sn system, while Ce was added to help prevent the segregation of harmful intermetallic compounds, such as Cu4MnSn, at the grain boundaries.
I used a CALPHAD-based method to determine the composition and homogenized the alloy at 700 °C for about 4 hours.
Cu-Sn shape memory alloys are known to gradually lose their properties over time, so I plan to test it again in three months.
I don’t yet have precise measurements of the elastic modulus or hardness.