The Evolution of Ultrafine Grained Structure Formation Through Isothermal Static Phase Transformation

作     者：HOSSEIN Beladi ILANA B Timokhina SUBRATA Mukherjee PETER D Hodgson 

作者机构：Centre for Material and Fibre InnovationDeakin UniversityGeelongAustraliaVic 3216 

出 版 物：《Journal of Iron and Steel Research International》 (国际钢铁研究杂志)

年 卷 期：2011年第18卷第S1期

页      面：218-222页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by grants through the Australian Research Council an ARC Laureate Fellowship (PDH) 

主　　题：ultrafine ferrite warm deformation isothermal phase transformation substructure 

摘      要：In the current study,a 0.3C-2Si-2Mn-0.28Mo (in wt%) steel with high hardenability was deformed at a relatively low temperature followed by isothermal static phase *** novel thermomechanical processing made it possible to successfully produce an ultrafine ferrite grained structure (～2 μm) in the absence of both dynamic phase transformation and controlled *** use of a model Ni-30Fe austenitic alloy showed that the low temperature deformation induced very fine intragranular defects throughout the microstructure,which would then act as fine spaced ferrite nucleation sites at an early stage of phase *** a result,the coarsening of ferrite was extremely limited during isothermal phase transformation,resulting a very fine ferrite grained structure;even nanoscale in the region of the prior austenite grain boundary.