Influence of Moderate Temperature Treatment on Thermal Cycling Behaviour and Mechanical Properties of the CuAINiMnTi Alloys

摘要

The influence of moderate temperature treatment after quenching on thermal cycling behaviour andmechanical properties of the CuAlNiMnTi shape memory alloys have been investigated.It is shownthat there will be α phase precipitation in the alloy when it is subjected to quenching followed bymoderate temperature treatment at 600℃.The precipitation of α phase can suppress NiAl-basephase precipitation during subsequent thermal cycling,therefore the stabilization of transformationtemperature during thermal cycling can be achieved.The suitable amount of α phase precipitationcontributes to the improvement of mechanical properties of the alloy by changing the fracturemorphology.