Al-5%Ti-5%(MnFeC)合金中的过渡相  

Transition Phase in Al-5%Ti-5%(MnFeC) Alloy

作　　者：于丽娜[1] 刘相法[1] 刘相俊[1] 边秀房[1] 

机构地区：[1]山东大学材料液态结构及其遗传性教育部重点实验室,济南250061

出　　处：《铸造》2004年第3期187-189,共3页Foundry

基　　金：国家自然科学基金(50171037);教育部科学技术研究重点项目(重点01105)。

摘　　要：研究了Al 5%Ti 5%(MnFeC)合金的显微组织,并对其形成原因进行了探讨。试验结果表明:Al 5%Ti 5%(MnFeC)合金的富Fe相呈灰色多面体状,且存在浓度有差异的两相;富Fe相是以长条状的TiAl3相为结晶基底析出的,或分布于该相两侧或分布于其端点处;在TiAl3相与外围富Fe相之间存在一过渡相(内层富Fe相),该过渡相是在液态下依附于TiAl3相析出的,它的存在是高锰高铁铝合金中铁相球化的根本原因;内层富Fe相形态较完整,而外围富Fe相有较多的裂纹。The microstructure of Al-5%Ti-5%(MnFeC) and the forming reason were researched in this paper. The experimental results show that the Fe-rich phases are gray polyhedral or circular in shape, which consist of inside and outside two regions according to morphologies and compositions. The Fe-rich phase nucleates on flaky TiAl_3 phase and distributes on the two sides or around the end of the TiAl_3 phase. The transition phase (the inside Fe-rich phase) exists between TiAl_3 phase and the outside Fe-rich phase and precipitates at the first solidifying stage, that is the reason of Fe-rich phase spheroidization in the alloy. The inside Fe-rich phase is integrated in form, while the one in periphery has many cracks.

关 键 词：过渡相 Al-5%Ti-5%(MnFeC)合金 TIAL3 富Fe相 

分 类 号：TG111[金属学及工艺—物理冶金]