About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Aluminum Alloys, Characterization and Processing
|
Presentation Title |
The Influence of Crystallographic Texture Gradients on the Deformation Response of Aluminum Extrusions |
Author(s) |
Warren J. Poole, Andrew Zang, Yu Wang, Mary Wells, Nick Parson |
On-Site Speaker (Planned) |
Warren J. Poole |
Abstract Scope |
The use of 6xxx series aluminum extrusions in automotive applications is increasing due to the requirement to reduce vehicle weight. Extruded profiles can be subjected to severe and complex plastic strain paths during fabrication or during crash loading. During the extrusion process, deformation gradients develop due to i) friction between the tooling and the extrudate, ii) redundant work and iii) splitting of the extrusion and welding in porthole dies when fabricating hollow profiles. The current study examined these effects in materials with high dispersoid densities at relatively low extrusion temperatures (~400oC) where recrystallization was deliberately suppressed. Local textures were characterized using electron back scatter diffraction (EBSD) and the local stress-strain response was predicted using the visco-plastic self-consistent (VPSC) polycrystal plasticity model. The results were used to rationalize i) the inhomogeneity of through thickness deformation during tensile testing and ii) the localization of plastic deformation at the weld seam. |
Proceedings Inclusion? |
Planned: Light Metals |
Keywords |
Aluminum, Mechanical Properties, |