Virtual Characterization of the mechanical properties of aluminum alloys at elevated temperatures

点击翻译按钮获取中文摘要

For decades, mass reduction has been a priority in the automotive sector for improving fuel economy. Many**manufacturers have opted for substituting typical steel components for lighter aluminum alloys. An application**of particular interest in this study is the use of 5xxx series aluminum-magnesium sheet alloys in panel**components. The difficulty with aluminum sheet, in the replacement of panel components, is the lower**formability at room temperatures than in steels. In addition, surface quality of formed parts at room temperature**is undesirable due to the Lüder's lines and serrated flow behaviour of Al-Mg sheet alloys (dynamic strain**aging/PLC effect). Hot deformation processing is a desirable method for shaping in industry due to the ability**to refine microstructure, which significantly influences the mechanical response and can increase formability.**Elevated temperature forming corresponds to a decreased flow stress and increased ductility of the sheet, which**can allow deep drawing and stretch in panels competitive with steels without design modifications. Virtual**material (VMC) characterization, performed with crystal plasticity theory, is a very powerful tool that can**characterize the mechanical properties of a material, at various temperatures and strain paths, with a fraction of**the cost and time of experiments. In this project, VMC is used to predict the mechanical anisotropy of the**aluminum alloy 5083 at 500oC.