|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||The Effect of Extrusion Rate on the Microstructural Evolution of ECAE Processed Pure Mg
||Nicholas Krywopusk, Laszlo J Kecskes, Timothy P Weihs
|On-Site Speaker (Planned)
Magnesium has been the subject of a significant number of investigations for its potential structural applications due to its low density and high specific strength. Whereas conventional processing is hindered by magnesium’s propensity for localization and failure, significant grain refinement has been achieved with Equal Channel Angular Extrusion (ECAE). Most ECAE processing studies have focused on the microstructural effects of extrusion temperature and route design, leaving extrusion rate effects largely overlooked. In this study billets of pure magnesium were processed 1, 2, 3, and 4 passes by the 4BC route at 3 extrusion rates. The higher extrusion rates produced an increase in the area fraction of recrystallized grains after a single pass, and the highest rate reduced the area fraction of the largest grains, compared to the two lower rates. However, both the highest and the lowest extrusions rates produced a larger fraction of twins than the intermediate rate.
||Planned: None Selected