Effect of Mg Addition on the Ferrite Grain Boundaries Misorientation in HAZ of Low Carbon Steels  

作　　者：Kai Zhu Zhenguo Yang 

机构地区：[1]Department of Materials Science, Fudan University, Shanghai 200433, China

出　　处：《Journal of Materials Science & Technology》2011年第3期252-256,共5页材料科学技术（英文版）

摘　　要：The relation between the Mg treatment and ferrite grain boundaries misorientation was investigated. The orientation imaging microscopy technique based on electron backscattered diffraction technique （EBSD） was used in this work. （t was found that the addition of 0.005 wt% Mg to the steel could evidently increase the ratio of acicular ferrite crystals appearing at large angles boundaries to each other, which was attributed to the nucleation of the second-phase particles by the Mg treatment. The FBSD techniques provide a power- ful method to characterize and quantify the ferrite grain boundaries misorientation, in order to relate it to toughness.The relation between the Mg treatment and ferrite grain boundaries misorientation was investigated. The orientation imaging microscopy technique based on electron backscattered diffraction technique （EBSD） was used in this work. （t was found that the addition of 0.005 wt% Mg to the steel could evidently increase the ratio of acicular ferrite crystals appearing at large angles boundaries to each other, which was attributed to the nucleation of the second-phase particles by the Mg treatment. The FBSD techniques provide a power- ful method to characterize and quantify the ferrite grain boundaries misorientation, in order to relate it to toughness.

关 键 词：Low carbon steels Mg Boundaries misorientation Electron backscattered diffraction technique （EBSD） 

分 类 号：TG457.11[金属学及工艺—焊接] TQ174.758.2[化学工程—陶瓷工业]