基于L-J位错密度模型的7050铝合金微观组织演变模拟Simulation of microstructure evolution of 7050 aluminum alloy based on L-J dislocation density model
王敬,贾艳艳,梁强
摘要(Abstract):
为了模拟分析铝合金热变形过程中的微观组织演变过程,采用热物理模拟试验机对7050铝合金在变形温度分别为573、623、673和723 K和应变速率分别为0.01、0.1、1和10 s~(-1)的条件下进行了热压缩试验。通过对试验数据进行处理,求解得到了7050铝合金的动态软化系数与加工硬化系数,并建立了改进后的Laasraoui-Jonas (L-J)临界位错密度模型,将该模型应用于合金热压缩变形过程的微观组织模拟,并与试验结果进行对比。结果表明:采用修正的L-J位错密度模型可以计算7050铝合金动态再结晶过程中的位错密度;修正的L-J位错密度模型结合元胞自动机能比较精确地模拟7050铝合金的动态再结晶过程。
关键词(KeyWords): 7050铝合金;位错密度模型;微观组织;动态再结晶
基金项目(Foundation): 重庆市教育委员会科学技术研究项目(KJQN202000813,KJQN201900836);; 重庆工商大学科研启动项目(1856037);; 制造装备机构设计与控制重庆市重点试验室开放课题(CTBU-KFJJ2018093,CTBU-KFJJ2019078)
作者(Author): 王敬,贾艳艳,梁强
DOI: 10.13289/j.issn.1009-6264.2021-0262
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