| Al-Cu合金时效组织演化的数值模拟 |
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| 引用本文： | 赵宇宏,陈铮,李晓玲,刘晓光. Al-Cu合金时效组织演化的数值模拟[J]. 材料导报, 2001, 15(6): 13-14,12 |
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| 作者姓名： | 赵宇宏 陈铮 李晓玲 刘晓光 |
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| 作者单位： | 西北工业大学材料科学与工程学院, |
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| 基金项目： | 国家自然科学基金资助(59871039) |
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| 摘 要： | 介绍了了种基于卡恩－希利 阿德方程（CHE）的动力学模型，该模型给经典CHE中加入影响沉淀相形貌的各向异性弹性应变能，通过CALPHAD方法获得热力学数据以保证模拟真实过程，可用于模拟Al-Cu合金的调幅分解和非匀相时效，后者须假定晶核先存在，因模型不包括成核机制。
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| 关 键 词： | 数值模拟 时效 CHE方程 扩散理论 铝－铜合金 组织演化 动力学 |
Numerical Simulation for Aging Microstructure Evolution of Al-Cu Alloys |
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| Zhao Yuhong Chen Zheng Li Xiaoling Liu Xiaoguang. Numerical Simulation for Aging Microstructure Evolution of Al-Cu Alloys[J]. Materials Review, 2001, 15(6): 13-14,12 |
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| Authors: | Zhao Yuhong Chen Zheng Li Xiaoling Liu Xiaoguang |
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| Abstract: | A kinetic model,based on the Cahn-Hilliard Equation(CHE),is described.The classic Cahn Hilliard Equation is extended to include the anisotropic elastic strain energy,which determines the morphology of pre cipitation.Thermodynamic data are obtained by the CALPHAD method for the metastable phases to achieve simula tion of real process.This extended model can simulate spinodal decomposition and general precipitation of Al-Cu al loys.The latter simulation should assume pre-existing nuclei since the model does not include mechanism for nucle ation. |
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| Keywords: | numerical simulation Al-Cu alloys aging CHE equation kinetic model |
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