Coarsening of M_(23)C_6 Precipitates in an Fe-Cr-C Ternary Alloy  

作　　者：ZHU Na-qiong , LU Li , HE Yan-lin , LI Lin , LU Xiao-gang ( Department of Materials Science and Engineering , Shanghai University , Shanghai 200072 , China ) 

出　　处：《Journal of Iron and Steel Research International》2012年第9期62-67,共6页

基　　金：Item Sponsored by National Natural Science Foundation of China ( 50971137 , 50934011 );National Basic Research Program of China ( 2010CB630802 )

摘　　要：Coarsening of M23C6precipitates in an Fe-12.4Cr-0.13Cternary alloy has been investigated ageing at 780℃ up to 200h.Evolution of M23C6carbides at different ageing times was determined experimentally using transmission electron microscopy.Particle size distribution was obtained with different measuring methods.Simulations of coarsening of M23C6precipitates were carried out using computational thermodynamics and kinetics.Results showed low coarsening rates for M23C6precipitates in the Fe-Cr-C ternary alloy.Interfacial energy of M23C6 / ferrite interface is between 0.1and 0.3J · m -2 for the coarsening of M23C6ageing at 780℃.Coarsening of M23C6precipitates in an Fe-12.4Cr-0.13Cternary alloy has been investigated ageing at 780℃ up to 200h.Evolution of M23C6carbides at different ageing times was determined experimentally using transmission electron microscopy.Particle size distribution was obtained with different measuring methods.Simulations of coarsening of M23C6precipitates were carried out using computational thermodynamics and kinetics.Results showed low coarsening rates for M23C6precipitates in the Fe-Cr-C ternary alloy.Interfacial energy of M23C6 / ferrite interface is between 0.1and 0.3J · m -2 for the coarsening of M23C6ageing at 780℃.

关 键 词：M23C6 COARSENING PSD interfacial energy 

分 类 号：TG111[金属学及工艺—物理冶金]