Process metallurgy design of aluminum alloy sheet rolling by using two-scale finite element analysis and optimization algorithm
Process metallurgy design of aluminum alloy sheet rolling by using two-scale finite element analysis and optimization algorithm
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DOI：
10.1016/j.ijmecsci.2009.08.009
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发表时间：
2010-02
影响因子：
7.3
通讯作者：
E. Nakamachi;H. Kuramae;H. Sakamoto;H. Morimoto
中科院分区：
文献类型：
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作者：
E. Nakamachi;H. Kuramae;H. Sakamoto;H. Morimoto
最近，不对称轧制（ASR）工艺被应用于铝合金板材的生产中，以控制微晶结构，以提高成形性和强度。到目前为止，已经开展了许多ASR工艺的实验和数值研究，但这些方案没有足够的能力来预测微观尺度的织构演化和宏观尺度的板材成形性。在本研究中，我们开发了工艺冶金设计代码来分析和优化板材轧制工艺。首先，我们的动态显式晶体学均质化弹/粘塑性有限元（二尺度 FE）代码用于分析 ASR 板材变形，并优化 ASR 工艺，采用响应面法生成高成形性板材。将最佳工艺条件下 ASR 金属板材的织构演变与实验结果进行了比较，并证实了我们设计代码的可用性。接下来，优化对称温轧的初始纹理，以产生更好的可成形性金属板材。因此，我们的两尺度有限元代码与优化算法相结合，被验证为工艺冶金设计中的综合工具，可预测塑性引起的织构演变，并优化轧制工艺和初始织构，以生成高成形性板材。
Recently, the asymmetric rolling (ASR) process was applied to the aluminum alloy sheet generation to control the micro-crystal structure in order to improve the formability and the strength. Until now, many experimental and numerical studies of ASR process have been carried out, but these schemes have not enough capability to predict the texture evolution at the micro-scale and the sheet formability at the macro-scale. In this study, we develop a process metallurgy design code to analyze and optimize the sheet rolling process. At first, our dynamic-explicit crystallographic homogenized elasto/viscoplastic finite element (two-scale FE) code was applied to analyze ASR sheet deformation and optimized ASR process to generate a high formability sheet metal by employing the response surface method. A texture evolution of ASR sheet metal under an optimum process condition was compared with the experimental results, and the availability of our design code was confirmed. Next, an initial texture for the symmetrical warm rolling was optimized to generate a better formability sheet metal. Consequently, our two-scale FE code combined with the optimization algorithm was verified as a comprehensive tool in the process metallurgy design to predict plastic induced texture evolutions and optimize a rolling process and an initial texture for a high formability sheet generation.