Abstract
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 (~400 °C) where recrystallization was deliberately suppressed. Local textures were characterized using electron backscatter 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.
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Acknowledgements
This work was undertaken, in part, thanks to funding from the Canada Research Chair program (Poole). Additional support of Rio Tinto Aluminium and the Natural Sciences and Engineering Research Council of Canada (NSERC) is gratefully acknowledged.
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© 2023 The Minerals, Metals & Materials Society
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Poole, W.J., Wang, Y., Zang, A., Wells, M.A., Parson, N.C. (2023). The Influence of Crystallographic Texture Gradients on the Deformation Response of Aluminum Extrusions. In: Broek, S. (eds) Light Metals 2023. TMS 2023. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-22532-1_35
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DOI: https://doi.org/10.1007/978-3-031-22532-1_35
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