Abstract

Two-way shape memory effect was investigated in Ti-Ni alloys. Solution-treated specimens were deformed beyond the end of the first stage of deformation; the total strain was varied from 8% to 37%, resulting in changing plastic strain from 2.5% to 26%. Shape change due to the two-way memory effect was measured. It was found that the shape change increased with increasing plastic strain and showed the maximum at about 10% plastic strain, while the shape change decreased with increasing plastic strain. The relationship between the two-way memory strain and plastic strain was almost the same for specimens deformed at 77K and Ms.

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