|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Mechanical Behavior of Nanostructured Materials
||L-132: An Experimental Investigation of Deformation Mechanisms in FCC Thin Films
||Marissa Linne, Samantha Daly
|On-Site Speaker (Planned)
This presentation will discuss an on-going investigation into the mechanical behavior of, and the interactions between slip and grain boundary sliding, in oligocrystalline Al thin films under uniaxial tensile loading. The hypothesis under examination is that slip at/near grain boundaries and grain boundary sliding are coupled, synergistic processes. Due to their nanoscale thickness and columnar grain structure, oligocrystalline Al films can be approximated as two-dimensional specimens, enabling characterization of dislocation glide and GBS mechanisms without sub-surface ambiguity. In this investigation, Al films with thicknesses of hundreds of nanometers were tested in-SEM under uniaxial tension through use of a custom MEMS actuator, and full-field surface displacements were measured using a high-resolution combination of scanning electron microscopy and distortion-corrected digital image correlation. Analysis of the resulting full-field data linking deformation behavior and underlying texture is used to inform crystal plasticity models provided insight into the interaction between GBS and dislocation-based deformation mechanisms.
||Planned: Supplemental Proceedings volume