关小军,付杰

• 1:山东大学材料液固结构演变与加工教育部重点实验室
• 2:山东大学材料科学与工程学院

摘要(Abstract)：

为了进一步改善瞬态形核率动态再结晶CA模型的动态回复阶段模拟精度,提出了采用应力差闭环控制-黄金搜索法取代唯象的位错密度增量模型来搜索、优化动态回复位错密度增量的方法,通过HPS485wf钢动态再结晶过程仿真和热模拟实验检验了该方法的合理性和应用效果。结果表明,这一方法合理、可行,能优化位错密度增量以提高动态回复阶段和动态再结晶全程的模拟精度和稳定性,较比传统的恒形核率动态再结晶CA模型的动态回复阶段和动态再结晶全程的模拟精度分别提高了98.91%和91.71%,较比瞬态形核率动态再结晶CA模型的动态回复阶段和动态再结晶全程的模拟精度分别提高了95.16%和49.47%。

关键词(KeyWords)： 动态回复;位错密度增量优化;元胞自动机;仿真;流变应力

Abstract:

Keywords:

基金项目(Foundation): 高等学校博士学科点专项科研基金(200804220021)

作者(Author): 关小军,付杰

DOI: 10.13289/j.issn.1009-6264.2016.02.040

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