无间隙原子钢晶界特性的电子背散射衍射研究  

STUDY OF GRAIN BOUNDARY CHARACTER OF INTERSTITIAL-FREE STEELS BY EBSD

作　　者：李有元[1] 曹圣泉[1] 陈家光[2] 

机构地区：[1]上海宝钢股份宝钢分公司冷轧厂,上海200941 [2]上海宝钢股份有限公司宝钢研究院测试中心,上海201900

出　　处：《理化检验（物理分册）》2006年第10期487-491,共5页Physical Testing and Chemical Analysis(Part A:Physical Testing)

基　　金：国家自然科学资金资助项目(50171040)

摘　　要：运用电子背散射衍射（EBSD）技术，对不同冷轧变形条件下再结晶IF钢板中的晶界特征分布和晶界连通性进行了研究。结果表明，增加冷轧变形量，有利于增加IF钢板中的小角度晶界（∑1），但对（∑3～∑29）重位点阵晶界的影响不大。低能特殊晶界（∑1～∑29）的增加有利于破碎IF钢板中的随机晶界网络，改善其晶界连通性。此外，IF钢板的晶界特征分布与其晶粒尺寸密切相关，小晶粒周围易出现低能特殊晶界，而大晶粒周围易出现高能随机晶界。Grain boundary character distribution （GBCD） and connectivity in the recrystallized IF steel sheets which cold-rolled by different reductions were investigated by electron back-scatter diffraction （EBSD）. The results show that higher cold reduction is favorable for increasing the frequency of low-angle boundaries （ ∑ 1 ）. While higher frequency of low-energy special boundaries （∑ 1-∑29） are favorable for the optimization of grain boundary connectivity. It has also beenfound that GBCD and connectivity of IF steels are closely related to the grain size. The small grains are mainly surrounded by special boundaries while the large grains are preferentially surrounded by random boundaries.

关 键 词：无间隙原子钢 晶界特性 电子背散射衍射 

分 类 号：TG113.12[金属学及工艺—物理冶金]