钽对 NiTi 形状记忆合金影响的研究(英文)

Effects of Ta addition on NiTi shape memory alloys

本文研究了钽对ＮｉＴｉ形状记忆合金的马氏体相变特征及Ｘ射线可视性的影响．结果表明，当钽含量从０增加到４ａｔ％时，其相变温度迅速增加，钽含量超过４ａｔ％时，则趋于缓慢；含钽合金可降低ＮｉＴｉ合金相变温度对ＮｉＴｉ相对含量变化的敏感性；钽的加入可改善ＮｉＴｉ双相合金的Ｘ射线可视性．

The effects of Ta addition on the martensitic transformation characteristics and the X ray visibility on NiTi shape memory alloy have been studied in (Ni 51 Ti 49 ) 1- x Ta x system. It was found that ①the transformation temperatures of the Ni 51 Ti 49 binary alloy increase drastically by an addition of 0～4at%Ta, but only slightly when the concentration exceeds 4at%. ②the addition of Ta greatly decreases the sensitivity of the martensitic transformations to the variation in the Ni Ti ratio. ③ The addition of Ta to a NiTi binary alloy can improve X ray visibility.