|About this Abstract
||Materials Science & Technology 2012
||Multifunctional Materials for Aerospace and Defense: Challenges and Prospects
||Experimental Investigations of Deformation Mechanisms Active in Ultrafine-Grained Aluminum
||Adam Kammers, Samantha Daly
|On-Site Speaker (Planned)
Ultrafine-grained (UFG) metals produced by equal channel angular pressing display a remarkable capacity for high strength, high ductility, and enhanced superplasticity. However the deformation mechanisms responsible for this behavior and their strain rate sensitivity are not well understood. This talk will provide new information on the deformation mechanisms responsible for these unique properties in UFG aluminum under different loading conditions. To do this, full-field strain and displacement maps of UFG aluminum under tensile loading are obtained through the application of a new experimental methodology combining Digital Image Correlation (DIC) with scanning electron microscopy (SEM). The strain and displacement fields obtained from this technique are related to the underlying microstructure through electron backscatter diffraction (EBSD) microstructure mapping of the surface. By analyzing the evolution of these full-field surface strains and displacements as loading progresses and their relation to the underlying microstructure, the active deformation mechanisms can be determined.