Indentation and laser annealing of NiTi shape memory alloys.
Su, Jun Feng.
Date of Issue2005
School of Mechanical and Aerospace Engineering
A shape memory alloy (SMA) is able to memorize and recover its original shape, after it has been deformed, by heating it over its transformation temperature. The recoverable strain can be as much as around 7% and actuation stress up to 500 MPa in NiTi SMAs. Because of this unique thermomechanical characteristic, SMAs, in particular, NiTi, have been used in a variety of applications, from medical equipment to Micro-Electro-Mechanical Systems (MEMS). This thesis includes two independent parts: one is on small scale shape memory behavior of NiTi using instrumented indentation technique; the other is about laser annealing of NiTi thin films for MEMS applications.
Nanyang Technological University