Abstract
After the reverse thermal induced martensitic transformation process of shape memory alloy is arrested at a temperature between the reverse transformation start and finish temperatures (As and Af), and then cooled to a temperature below Mf, a kinetic stop which is closely related to the previous arrested temperature will appear in the next complete transformation. This phenomenon is called temperature memory effect (TME). The TME induced by incomplete cycling in Ni-Mn-Ga shape memory alloy is systematically studied by performing either a single incomplete cycle, or a sequence of incomplete cycles with different arrested temperature. Results indicated that TME phenomenon exists in Ni-Mn-Ga-based SMAs. When a sequence of incomplete cycles is performed, we can observe only one kinetic stop in the next complete thermal cycle in the dual-phase Ni-Mn-Ga alloy. Moreover, the TME can be wiped out by heating the SMAs to a temperature higher than Af. The origin of the TME in Ni-Mn-Ga FSMAs has been discussed in this present paper.
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