Q235碳素钢拉伸塑性变形过程中组织转变的EBSD“原位”分析研究  

EBSD "In-Situ" Study of Microstructural Transformation of Plain Carbon Steel Q235 During Tension Deformation

作　　者：丁大伟[1] 徐学东[1] 

机构地区：[1]北京工业大学固体微结构与性能研究所,北京100124

出　　处：《钢铁》2009年第2期56-59,共4页Iron and Steel

基　　金："十一五"国家科技支撑项目(2006BKA02B02)

摘　　要：利用设计的"原位"观察方法,在配备EBSD的场发射扫描电子显微镜中,对Q235碳素钢固定区域拉伸过程中的应力应变曲线上各个特征点进行EBSD试验,得到了Q235碳素钢与应力应变曲线各特征点相对应的晶粒取向图,为进一步研究该材料形变过程中的组织提供了基础数据。由于形变过程中位错开动、运动及相互作用等因素,大角度晶界在总晶界中的比例在应变1%处达到一个峰值。EBSD experiments were carried out using the designed ＂in-situ＂ observing method, through a EBSD scanning electron microscope, at each characteristic point of stress-strain curve of Q235 carbon steel. The grain orientation graphs were obtained, providing foundation data of deformation process for further research. Since the dislocations started, moved and effected at each other during the deformation process, the portion of high angle grain boundary achieved a peak value in grain boundary distribution at a strain of 1%.

关 键 词：Q235碳素钢 背散射电子衍射 晶粒取向图 大角度晶界 

分 类 号：TG142.15[一般工业技术—材料科学与工程]