TiAl＋Sb合金室温变形亚结构的研究

STUDY OF SUBSTRUCTURE OF TiAl+Sb BASED ALLOY DEFORMED AT ATMOSPHERE TEMPERATURE

使用透射电子显微镜，较详细地研究了Ｔｉ－３４Ａｌ－０．５Ｓｂ（ｗｔ％）合金经过２～３％室温压缩塑性变形以后的变形亚结构。试验结果表明，ＴｉＡｌ＋Ｓｂ合金室温变形时，在ｒ相板条内形成大量变形孪晶。相邻板条呈某种位向关系下，可以以相界面作镜面，在其两侧的两片ｒ相板条内形成呈一一对应关系的变形孪晶。而在一些取向的ｒ相板条内只产生位错。

The deformed substructure of Ti-34A1-0.5Sb(wt%) alloy pressed for 2～3% at room-temperature was investigated in details using TEM.The test result showed that a number of deformed twins formed within r-phase laths when the alloy suffered from deformation at atmosphere temperature.Both neighbouring r phase laths there were most deformed twins which show corresponding relation each other on the two laths boundary when these have some direction.However,Other r-phase laths only contained some dislocations.