Physically Based Microstructure Modelling of AA6082 during Hot Extrusion
Physically Based Microstructure Modelling of AA6082 during Hot Extrusion
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AA6082 热挤压过程中基于物理的微观结构建模
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
C. Sommitsch
中科院分区：
文献类型：
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作者：
F. Krumphals;P. Sherstnev;S. Mitsche;S. Randjelovic;C. Sommitsch
铝挤压工艺中的工艺参数是影响产品性能的关键。研究了不同工艺条件对6082铝合金沉淀硬化的影响，模拟并实验验证了沉淀硬化对最终组织的影响。将基于三种位错类型和三个再结晶形核位置的物理微观组织模型应用于商业有限元程序Forge 2008，计算挤压过程中的组织演变以及挤压后的再结晶分数。由于再结晶的主要形核机制是颗粒激发，利用热力学计算软件MatCalc研究了均匀化过程中的析出动力学。通过微型挤压试验进行了实验验证，并通过金相组织分析和EBSD测量对其微观组织进行了研究。
Process parameters in aluminium extrusion technology are key points that influence product properties. The precipitation hardening aluminium alloy 6082 is investigated according to different process conditions and the influence onto the final microstructure is simulated as well as experimentally verified. A physical microstructure model based on three dislocation types and three nucleation sites for recrystallization is implemented into the commercial Finite Element package FORGE 2008 to calculate both the microstructure evolution during the extrusion process as well as the recrystallized fraction after the process. The precipitation kinetics during homogenization was investigated using the thermodynamic calculation software MatCalc since the main nucleation mechanism for recrystallization is particle stimulated. The experimental validation was done by miniature extrusion tests and the microstructure was investigated metallographically and by EBSD measurements.