中南大学学报（自然科学版）2018，Vol.49Issue(3)：536-543,8.DOI:10.11817/j.issn.1672-7207.2018.03.004
Cr12MoV钢动态再结晶过程的元胞自动机模拟
Dynamic recrystallization simulation of Cr12MoV steel using cellular automation method
摘要
Abstract
The dynamic recrystallization(DRX) behaviors of Cr12MoV steel were investigated by using Gleeble?3500 thermo-simulation machine at the deformation temperature varying from 1 050 ℃ to 1 150 ℃, strain rate ranging from 0.01 s?1to 10 s?1. By using regression analysis result obtained from the investigation, a cellular automata(CA) model was built and used to simulate the DRX process of Cr12MoV. The results reveal that the hot deformation activation energy of Cr12MoV is 458.069 kJ/mol. As for the mean size of dynamic recrystallized grains, the relative error between the mean size simulated by CA and the experiment value is within 10.2%. Meanwhile, the predicted stress?strain curve obtained by CA can properly reflect the stress?strain curve features of the DRX. Corresponding well with experiment results, the relative error of peak stress between two curves is within 3.9%. It's a positive correlation between the mean grain size and recrystallized percentage of DRX within a proper strain range. The higher the strain rate is, the more insufficient the DRX will be and it becomes easier to obtain smaller DRX grains with the increase of strain.关键词
元胞自动机/动态再结晶/材料计算科学/组织模拟Key words
cellular automata/dynamic recrystallization/computational material science/microstructure simulation分类
矿业与冶金引用本文复制引用
陈森林,廖敦明,滕子浩,陈涛..Cr12MoV钢动态再结晶过程的元胞自动机模拟[J].中南大学学报（自然科学版）,2018,49(3):536-543,8.基金项目
教育部新世纪优秀人才支持计划项目(NCET-13-0229) (Project(NCET-13-0229) supported by the New Century Excellent Talents in University) （NCET-13-0229）
