|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Ultrafine-grained Materials X
||The Impact of Severe Plastic Deformation and Subsequent Annealing on Elevated Temperature Deformation Behavior of Al-Mg Alloys
||Chenlu Meng, Stefanie Sandloebes, Sandra Korte-Kerzel, Günter Gottstein
|On-Site Speaker (Planned)
This investigation addresses the influence of severe plastic deformation (SPD) and subsequent annealing on the elevated temperature deformation behavior of solid solution Al-Mg alloys with different Mg contents. SPD was conducted by confined channel die pressing at room temperature to produce an ultrafine grain (UFG) structure. After annealing at different temperatures the microstructure and elevated temperature mechanical properties were investigated. During short time annealing at moderately elevated temperatures (e.g. 30 min at 100°C) the microstructure remained in the ultrafine range. Strain rate jump tests of the SPD and annealed samples revealed a conspicuous change of the flow stress response with increasing temperature. We propose to attribute this behavior to a change of deformation mechanisms with increasing temperature. A theoretical analysis reveals that this transition is affected by the UFG structure such that a larger SPD strain substantially decreases the transition temperature between low and high temperature deformation behavior.
||Planned: Supplemental Proceedings volume