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Seam welds modeling and mechanical properties prediction in the extrusion of AA6082 alloy

机译：AA6082合金挤压缝焊的建模与力学性能预测。

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摘要

This work summarizes the outcome of recent research by the authors on modeling the formation of seam welds in aluminum extrusion and on evaluating the related mechanical properties on the final products. A profile with a seam weld in the middle section was produced with different die designs in order to investigate the relation between die design and local welding parameters, such as contact pressure, temperature, time of contact, strain and strain rate paths. The local welding conditions were evaluated by complete thermo-mechanical 3D FEM simulation of the processes. Specimens were extracted from the profiles and tensile tested, the resulting mechanical properties being discussed with respect to the local welding conditions. The possibility to adopt criteria for assessing the welding quality is discussed, together with the effect of high speed damage cracking.
机译：这项工作总结了作者最近的研究成果，这些研究成果是对铝挤压中缝焊的形成进行建模并评估最终产品的相关机械性能。为了研究模具设计与局部焊接参数（例如接触压力，温度，接触时间，应变和应变速率路径）之间的关系，在中间部分制造了带有缝焊的型材。通过对过程进行完整的热机械3D FEM仿真来评估局部焊接条件。从型材中提取试样并进行拉伸测试，然后就局部焊接条件讨论所得的机械性能。讨论了采用评估焊接质量标准的可能性，以及高速损伤裂纹的影响。

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