%0 Journal Article
%T The precipitation mechanism of secondary $\eta$ phase in a\par<br>Fe-Ni基合金中次生η相的析出机理
%A LI Xiuyan
%A ZHANG Jian
%A RONG Lijian
%A LI Yiyi
%A <br>李秀艳
%A 张建
%A 戎利建
%A 李依依
%J 材料研究学报
%D 2006
%I 
%X The precipitation mechanisms of $\eta$ phase in a FeNi--based alloy were explored. It was revealed that $\eta$ phase has a coherent orientation relationship with $\gamma$ matrix as follows, $\{001\}_{\eta}//\{111\}_{\gamma}$, $\langle 110\rangle_{\gamma}//\langle 210\rangle_{\eta}$. The precipitation of $\eta$ phase proceeded by nucleating at $\gamma^{\prime}$ phase at random grain boundaries through forming stacking fault layer caused by slip of partial dislocations and by growing in step mode, which was controlled by the long distance diffusion of atoms. The grain boundary migrated with precipitated $\eta$ phase into the neighbor grain which was incoherent with $\eta$ phase. The solution and disappearing of $\gamma^{\prime}$ was caused by precipitation of $\eta$ phase.\
%K EBSD<br>金属材料
%K 铁镍基奥氏体合金
%K 次生η相
%K 共格
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=C101C4C04993B4D94FCD8446E6CBEB3B&aid=6E8DB5BAD934010F&yid=37904DC365DD7266&vid=A04140E723CB732E&iid=0B39A22176CE99FB&sid=A63576421B012172&eid=EFD65B51496FB200&journal_id=1005-3093&journal_name=材料研究学报&referenced_num=0&reference_num=12