摘要
Fe-3%Si取向硅钢在高温退火过程中Goss取向晶粒异常长大行为的影响因素及机制一直是研究的热点。本文采用改进的Monte Carlo Potts模型对这一现象进行了模拟仿真研究,新模型考虑了晶界能和晶界迁移率的各向异性,设第二相粒子在基体中随机分布,同时引入参数P表示晶粒在长大过程中被第二相粒子钉扎住的面积百分数。模拟的初始组织来自于脱碳退火后试样EBSD取向数据。EBSD结果表明,初次再结晶组织中Goss取向晶粒没有尺寸优势和数量优势。模拟结果表明,Goss取向晶粒异常长大现象的出现与P值的大小有着紧密的联系,P值越大,Goss取向晶粒越容易发生异常长大。
The influence factors and mechanism of abnormal growth of Goss oriented grains in Fe- 3% Si steel during the process of high temperature annealing has been a hotspot in research area. This phenomenon was studied using a modified Monte Carlo Potts Model in this paper,and the new model considered the anisotropy of grain energy and mobility. In the simulation,we presume that second- phase particles are randomly distributed in the initial microstructures,meanwhile a parameter P was introduced to represent the area percentage of the grains which was pinned by second- phase particles during grain growth.The starting microstructures for the simulations were generated from electron back- scatter diffraction（ EBSD） orientation imaging mappings of recrystallized samples. The EBSD experimental results showed that the initial Goss grains have no advantages in numbers and sizes compared to other grains. And,the simulation results showed that the abnormal growth of Goss oriented grains has a strong connection to the parameter P. The greater the value of P,the easier the appearance of abnormal growth of Goss oriented grains.
作者
信冬群
孟利
巩学海
王浩
何承绪
马光
XIN Dongqun MENG Li GONG Xuehai WANG Hao HE Chengxu MA Guang(School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China Beijing R＆D Center, East China Branch of Central Iron and Steel Research Institute, Beijing 100081, China Department of Electrical Engineering New Materials, Global Energy Interconnection Research Institute, Beijing 102211, China)
出处
《中国体视学与图像分析》
2016年第3期285-291,共7页
Chinese Journal of Stereology and Image Analysis
基金
国家自然科学基金资助项目(51571020
51371030
51201007
51171019)
国家电网公司科技项目资助(SGRI-WD-71-13-002)
