%0 Journal Article
%T Effects of Pre-Strain on Bake Hardenability  and Precipitation Behavior of Al-Mg-Si Automotive Body Sheets
%A Guanjun Gao
%A Lizhen Yan
%A Xiwu Li
%J Journal of Materials Science and Chemical Engineering
%P 53-64
%@ 2327-6053
%D 2024
%I Scientific Research Publishing
%R 10.4236/msce.2024.127005
%X The study investigates the effects of pre-strain on the bake hardenability and precipitation behavior of Al-Mg-Si automotive body sheets. The scanning electron microscopy, transmission electron microscopy, tensile test, Vickers hardness test, and differential scanning calorimetry were conducted for the purpose. It was found that the pre-strain treatment partially inhibits the natural aging hardening effect but cannot completely eliminate it. The pre-straining significantly enhances the bake hardening effect, with the 5% pre-strain sample showing the highest increase in yield strength and hardness. The formation of fine ¦Â" precipitates and dislocation structures contribute to the observed strengthening. Additionally, the study highlights the importance of optimizing pre-strain levels to achieve the best balance between strength and ductility in bake-hardened aluminum alloys.
%K Al-Mg-Si Alloy
%K Pre-Strain
%K Bake Hardenability
%K Precipitation Behavior
%K Clusters
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=134981