|About this Abstract
||2019 TMS Annual Meeting & Exhibition
||TMS-DGM Symposium on Lightweight Metals: A Joint US-European Symposium on Challenges in Light Weighting the Transportation Industry
||The Dependence of Local Strain Distribution on Quench Rate for Extruded Al-Mg-Si-Mn-Fe Alloys
||Warren J. Poole, Mojtaba Mansouri, Nick Parson, Mei Li
|On-Site Speaker (Planned)
The ductility of Al-Mg-Si-Mn-Fe extrusion alloys is an important property which affects the forming of automotive parts and the in-service behaviour. The precipitation of Mg-Si particles on the grain boundaries during quenching and artificial aging can reduce the fracture strain of the material due to i) strain localization at the grain boundary associated with the formation of a precipitate free zone at the grain boundary, and ii) reduction of the cohesive strength of the grain boundary. The effect of quench rate and aging treatment on strain distribution within the grains and across the grain boundaries has been quantified using high resolution digital image correlation. The results show the degree of strain localization at the grain boundary is dependent on the cooling rate after the solution treatment. The localization correlates with the width of the precipitate free zone and the cohesive strength relates to the precipitate density on grain boundaries.
||Planned: Light Metals