Methods of fabricating Cu-Al-Ni shape memory alloys

Recently Cu-Al-Ni shape memory alloys have gained special attention due to their high temperature applications. This article attempts to formulate the various processing routes for processing of Cu-Al-Ni shape memory alloys such as casting route, powder metallurgy route, rapid solidification and spray forming process. The pros and cons of various processes are provided in detail. The additive manufacturing, which is an emerging process is discussed which could be a promising technique of preparing Cu-Al-Ni shape memory alloys. Further recommendations are provided in terms of producing fine-grained near net shape shape memory alloys for high temperature applications.