Abstract
The purpose of this research is that the variations of potential energy of Ti Ni shape memory alloy (SMA) are obtained during slip and compared with the experimental results. This energy is calculated using by Modified Embedded Atom Method (MEAM) as a semi-empirical potential energy calculation. First, the potential energy of the FCC structure of Ni is calculated during the several kinds of slip system, {111}<101>, {111}<112> and {110}<110>. All of the potential energy increase with the slip from the stable structure and attain the peak, i.e. the maximum energy. The peak energy of {111}<101> is lowest those of the other slip systems. This indicates that a slip occurs along <101> direction within <111> plane and this is the real slip system of Fcc metal. Second, the potential energy of the B2 structure of Ti Ni SMA is calculated during slipping an atom along <111> direction on {110} plane and <001> direction on {110} plane. The peak of {110}<111> which is the real slip system of BCC is lower than {110}<001>
