%0 Journal Article
%T Abnormal austenite-ferrite transformation behavior in pure iron
%A LIU Yongchang
%A F Sommer & E J Mittemeijer College of Material Sciences & Engineering
%A Tianjin University
%A Tian-jin
%A China
%A Max Planck Institute for Metals Research
%A Heisenberg Str
%A D- Stuttgart
%A Germany
%A <br>LIUYongchang
%A F.Sommer
%A E.J.Mittemeijer
%J 科学通报(英文版)
%D 2004
%I 
%X The austenite ferrite transformation is the most important reaction route in the manufacture of Fe-based materials. Here the austenite (g) ferrite (a) transformation of pure iron was systematically explored by high-resolution dilatometry. Abnormal transformation ki-netics, multi-peak discontinuous reaction, was recognized in pure iron according to the variation of the ferrite-formation rate. The occurrence the one or the other type of ga trans-formation strongly depends on the grain size: the transfor-mation type changes from abnormal to normal (single-peak continuous reaction) with decreasing grain size. The inherent reason for the occurrence of abnormal transformation could be attributed to the repeated nucleation in front of the mov-ing g/a interface induced by the accumulation of elastic and plastic accommodation energy.
%K pure iron
%K solid-state phase transformation
%K nucleation
%K kinetics<br>奥氏体
%K 铁氧体
%K 纯铁
%K 成核作用
%K 动力学
%K 固相转变
%K 微结构
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=F1A7B3E4DC64AA82F6812F56101E87C6&yid=D0E58B75BFD8E51C&vid=2A3781E88AB1776F&iid=9CF7A0430CBB2DFD&sid=8115E88DD41C4B46&eid=997CCAFE43D4D200&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=0&reference_num=10