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退火铝合金中Portevin-Le Chatelier效应的数值模拟研究
引用本文:江慧丰,张青川,陈忠家,伍小平.退火铝合金中Portevin-Le Chatelier效应的数值模拟研究[J].物理学报,2006,55(6):2856-2859.
作者姓名:江慧丰  张青川  陈忠家  伍小平
作者单位:中国科学技术大学,中国科学院材料力学行为和设计重点实验室,合肥 230027
基金项目:国家自然科学基金;国家自然科学基金
摘    要:通过综合考虑沉淀动力学和动态应变时效机理,建立了一套具有明确物理内涵的唯象本构模型.并在对不同加载应变率下的单轴拉伸实验的数值模拟中,得到了3种类型的Portevin-Le Chatelier效应应力曲线.计算结果与实验数据的较好吻合,验证了该模型的有效性. 关键词: Portevin-Le Chatelier效应 动态应变时效 数值模拟

关 键 词:Portevin-Le  Chatelier效应  动态应变时效  数值模拟
文章编号:1000-3290/2006/55(06)/2856-04
收稿时间:2005-11-17
修稿时间:2005-11-172005-12-08

Numerical simulation of the Portevin-Le Chatelier effect in annealed aluminum alloys
Jiang Hui-Feng,Zhang Qing-Chuan,Chen Zhong-Jia,Wu Xiao-Ping.Numerical simulation of the Portevin-Le Chatelier effect in annealed aluminum alloys[J].Acta Physica Sinica,2006,55(6):2856-2859.
Authors:Jiang Hui-Feng  Zhang Qing-Chuan  Chen Zhong-Jia  Wu Xiao-Ping
Institution:CAS Key Laboratory of Mechanical Behavior and Design of Materials, University of Science and Technology of China, Hefei 230027, China
Abstract:By taking into account of the precipitate kinetics and the dynamic strain aging mechanism, a phenomenological model with clear physical origin is established in this paper. Three types of serrated flow in the Portevin-Le Chatelier effect is reproduced by the numerical simulations of the uniaxial tensile tests with different applied strain rates. The computational results are found in good agreement with the experimental curves, which testifies the validity of the present model.
Keywords:Portevin-Le Chatelier effect  dynamic strain aging  numerical simulation
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