|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||In Operando Nano- and Micro-mechanical Characterization of Materials with Special Emphasis on In Situ Techniques
||An Experimental Investigation of Deformation Mechanisms in FCC Thin Films
||Marissa Linne, Samantha Daly
|On-Site Speaker (Planned)
Dislocation slip and grain boundary sliding (GBS) are centrally important to the behavior of polycrystalline metallic materials, but little is known about the interactions between these mechanisms during plastic deformation. This presentation will discuss an on-going experimental investigation of the mechanical behavior of Au thin films under tensile loading. Due to their nanoscale thickness and columnar grain structures, oligocrystalline Au films can be approximated as two-dimensional specimens. In this case, dislocation glide and GBS mechanisms can be characterized without sub-surface ambiguity. Using a custom MEMS actuator, tensile strain was applied in-SEM to Au films with thicknesses of hundreds of nanometers, 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, high resolution data linking deformation behavior and underlying texture provided quantitative insights into the interaction between GBS and dislocation-based deformation mechanisms in Au thin films.
||Planned: A print-only volume