|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Magnesium Technology 2016
||Deformation Behavior of Mg Single Crystals Compressed Along c-axis
||Kelvin Xie, Zafir Alam, Alex Caffee, Kevin J Hemker
|On-Site Speaker (Planned)
Magnesium (Mg) and its alloys have attracted research and industrial interest due to their light-weight and high specific strength, making them potential structural materials in automobile and aerospace applications. However, Mg exhibits poor formability due to the difficulty in activating <c+a> dislocations and compression twins. High purity Mg single crystals were compressed along <0001>, and detailed slip trace analysis highlights pyramidal I slip as the dominant slip system, in contrast to the well-accepted notion that pyramidal II slip governs. TEM observations, using two beam and weak-beam dark-field techniques, provided additional mechanistic insight; in addition to pyramidal I <c+a> dislocations, some pure <a> and pure <c> dislocations were also observed in the deformed samples. These results, which provide fundamental details of <c+a> dislocation structures in pure Mg, are expected to serve as benchmarks for ab initio and atomistic simulations and for future mechanical properties studies involving Mg-based alloys.
||Planned: A combination print-CD volume