|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||Simulation of Grain Boundary/Slip Band Interaction in Polycrystalline Metallic Materials
||Julien Genee, Patrick VILLECHAISE, Loïc Signor
|On-Site Speaker (Planned)
The present study is devoted to local mechanical effects due to slip band interaction with grain boundaries in polycrystalline metallic materials. Past experiments showed that a difficult slip transmission between two neighbouring grains may result in the formation of a localized crystallographic rotation at the tip of the slip band. Quantitative data related to slip band activity and local crystallographic orientation (EBSD) were obtained from in situ SEM mechanical testing. For this study, different microstructures of Ni-based polycrystalline superalloys were chosen. Numerical FE simulations, taking into account the crystalline anisotropy of mechanical properties, were performed to investigate the grain boundaries configurations favouring this process and to analyse local stresses and deformation fields. Experimental and numerical results are compared and discussed regarding early fatigue damage mechanism at grain boundaries.
||Planned: Publication Outside of TMS (Indicate publication title and publisher if known.)