<報文>Ni過剰TiNi合金における時効過程の金相学的研究

概要

論文の詳細を見る
Metallographic studies have been made for precipitates and precipitation processes in Ti-52,54 and 56 at % Ni alloys. Three types of precipitates, namely, TiNi_3,Ti_2Ni_3 and Ti_3Ni_4 were observed in the specimens aged at 773-1073 K. The precipitation sequence can be indicated as Ti_3Ni_4→Ti_2Ni_3→TiNi_3,which is in good agreement with the previous works by Nishida et al.. The degree of the spontaneous shape change by all-round and excess shape memory effects of the specimens aged under constraint was obtained quantitatively in connection with the TTT diagram of a Ti-52 at % Ni alloy. It was also clarified that the lenticular and spherical precipitates of Ti_3Ni_4 play a significant role on the all-round and excess shape memory effect, respectively.metallographicprecipitateTTT diagramall-round shape memoryexcess shape memorytitanium nickel alloy
東北大学の論文
1988-03-25