Abstract
Shape Memory Alloys which are one of the new functional materials are developing on the metallurgical research and application. These alloys have two specific properties of Shape Memory Effect and Super Elasticity. Ti-Ni, Cu and Fe Systems are practical materials. Researches are developing on 1) The new Shape Memory Alloys, 2) Discover of new Shape Memory Effect, 3) Workability, 4) Materials production by powder metallurgy. The problems to be clarify in future are 1) Prevention of deterioration and increase of life time, 2) The biocompatibility. There are many applications on industry machine, energy, medicine, architecture, electronics, subsistence goods and so on. In the medical field, applications are developing on artificial heart, dentistry and others.
