|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||In Operando Nano- and Micro-mechanical Characterization of Materials with Special Emphasis on In Situ Techniques
||In Situ TEM Investigation on the Mechanical Behaviour of Micronanoscaled Single Crystal Titanium and Magnesium
||Zhiwei Shan, Boyu Liu
|On-Site Speaker (Planned)
In this talk, I will review our recent progress on studying hexagonal-close-packed metals. We found that when the sample size was reduced below 1000 nm or so, stress saturation and deformation mechanism transition occurred in a single crystal Ti alloy. Most interestingly, our study on single crystal pure magnesium found that when submicron-sized samples were compressed normal to its prismatic plane, the reorientation of the parent lattice produced a new orientational relationship akin to that of conventional twinning, but without a crystallographic mirror plane. In addition, the migration of the boundary between the parent lattice and newly formed crystal is dominated by the movement of the semicoherent basal/prismatic interfaces undergoing basal/prismatic transformation via unit cell reconstruction. This newly discovered deformation mode is different from the well known dislocation or twinning mediated plasticity and therefore broadens the known mechanisms of plasticity.
||Planned: A print-only volume