| The shape memory characteristics in TiNi alloys are greatly effected by the alloy composition and heat treatment condition. The present work was aimed to investigate the effect of Pd_x(X=5, 10, 15, 20) addition on the shape memory characteristics of TiNi alloys by means of eletrical resistance measurement, X-ray diffraction, differential scanning calorimetry and electron dispersive analysis X-ray measurement. The results obtained from this study are as follows ; 1. The martensitic transformation start temperature, Ms of Ti-Ni_(50-x)-Pd_x alloys decreased considerably with the increase of Pd content up to 10at%, whereas increased largely with the increase of Pd content in the alloys with Pd content more than 15at%. 2. The Ms temperature of Ti-Ni_(50-x)-Pd_x alloys with cold working was significantly lower than that, of the fully annealed alloys because high density dislocation has been introduced by the cold working which suppressed the martensitic transformation. |
|
