|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||High-resolution Plastic Strain Mapping during Tensile Deformation of a Magnesium Alloy
||Alberto Orozco-Caballero, David Lunt, Joćo Quinta da Fonseca
|On-Site Speaker (Planned)
The formability of Magnesium alloys is controlled by their propensity for strain localization, which occurs by the complex interaction of slip and twinning. Whereas twinning can be readily studied using EBSD, the characteristics of slip and its interaction with the microstructure cannot. High-resolution digital image correlation (HR-DIC) was used to study quantitatively the plastic deformation of AZ31 during tensile loading. Gold remodelling was used to create a nanoscale pattern suitable for high-resolution measurement. To avoid oxidation during gold remodelling, styrene was used instead of water as a remodelling medium, making strain mapping with sub-micron resolution possible in a magnesium alloy for the first time. The measurements revealed complex interactions between slip and twinning, forming transgranular bands of strain localization containing grains shearing parallel to the band and perpendicular to it, forming deformation kinks. The implications for formability of Mg alloys are discussed.
||Planned: EPD Congress Volume