October 30, 2023

Definition : Shape memory alloys are special type of alloys that have the ability to return to a original defined shape when heated. Shape memory alloys are also called as smart materials (or) intelligent materials (or) active materials. The shape memory transformation was first observed by Chang and Read in 1932. Examples of SMA’s a)

Since the atoms in the metallic glasses are disordered, they have some peculiar properties as follows. a) Structural properties Metallic glass have tetrahedral closely packed (TCP) structure rather than hexagonal closely packed (HCP) structure. They do not have any crystal defects such as grain boundaries, dislocations, etc. b) Mechanical (or) General properties The metallic glasses