Microstructure and mechanical properties of a Ni30Cu20Mn41.5Ga8.5 dual-phase shape memory alloy

A ductile Ni30Cu20Mn41.5Ga8.5 dual-phase shape memory alloy was reported with the shape memory effect of 1.8%, the compressive plasticity of more than 70%, and the tensile plasticity of 4%. Although there is only small amount of the second phase distributing along the grain boundaries, in-situ morphology observations during dynamic tensile tests revealed their key contributions to the ductility of the alloy.