|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||In-situ Neutron Diffraction of Pure Mg during ECAE Processing
||Nicholas Krywopusk, Laszlo J Kecskes, Matthew J Frost, Alexandru D Stoica, Todd C Hufnagel, Ke An, Timothy P Weihs
|On-Site Speaker (Planned)
While magnesium has shown promise as a structural material, it often displays poor low-temperature formability. At moderate temperatures, though, Equal Channel Angular Extrusion (ECAE) of magnesium has resulted in beneficial grain refinement and texture modification through the process of dynamic recrystallization (DRX). However, understanding DRX and its controlling mechanisms has proven difficult to achieve using ex-situ studies. Here we report on in-situ neutron diffraction experiments that were performed during ECAE processing at the VULCAN beamline at SNS using strongly textured samples of pure magnesium. Three temperatures and two texture orientations were investigated using a neutron transparent ECAE die. The in situ data for peak profiles and peak evolution are being analyzed to determine 1) the size of the recrystallized nuclei, 2) the temperature dependence of recrystallization, initial and final grain size, and lattice strain, and 3) the active DRX mechanisms. Results of this analysis will be presented.
||Planned: Supplemental Proceedings volume