%0 Journal Article
%T OVERALL ACTIVATION ENERGY OF ISOTHERMAL TRANSFORMATION IN METAL ALLOY AND ITS MECHANISM I. Medium Temperature (Bainite) Isothermal Transformation in Steels<br>金属合金等温相变的体激活能及相变机制I.钢的中温(贝氏体)等温相变
%A KANG Mokuang
%A ZHANG Mingxing
%A LIU Feng
%A ZHU Ming
%A <br>康沫狂
%A 张明星
%A 刘峰
%A 朱明
%J 金属学报
%D 2009
%I 
%X Upper bainite, lower bainite and granular structure in isothermally treated steels have all themselves C curves. A single microstructure is always produced in the primary stage, whereas the nearby two-microstructure complex is usually produced in the medium or final stage of the transformation. Only a single microstructure and Arrhenius equation must be used to deduce the overall activation energy for the transformation product. A combination of overall activation energy, morphology and free energy curve can explain the bainitic transformation mechanism and granular structure formation mechanism. The former follows military atom diffusionless martensite-like shear, which occurred in carbon-depleted region controlled by carbon atom diffusion in austenite, and the latter results from civilian atom diffusionless interface control transformation, which occurred in the most carbon--depleted region controlled by carbon atom diffusion in austenite.
%K bainite transformation
%K overall activation energy
%K granular structure
%K granular bainite
%K martensite-like shear
%K interface control transformation
%K steel<br>贝氏体相变
%K 体激活能
%K 粒状组织
%K 粒状贝氏体
%K 马氏体样切变
%K 界面控制相变
%K 钢
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=AB188D3B70B071C57EB64E395D864ECE&jid=B061E1135F1CBDEE96CD96C109FEAD65&aid=0D249FCE9ABB7A09326BFE44EF82BBB1&yid=DE12191FBD62783C&vid=94E7F66E6C42FA23&iid=CA4FD0336C81A37A&sid=C5154311167311FE&eid=4AD960B5AD2D111A&journal_id=0412-1961&journal_name=金属学报&referenced_num=0&reference_num=22