|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||3D Analysis of Dislocations near Grain Boundary Using Nonlocal Plasticity Model
||Chen Zhang, Philip Eisenlohr, Thomas R. Bieler, Martin A. Crimp, Carl J. Boehlert
|On-Site Speaker (Planned)
A 3D analysis of dislocation activity near grain boundaries in a Ti-5Al-2.5Sn specimen deformed under uniaxial tension at room temperature was performed using an efficient nonlocal crystal plasticity model. The microstructure used in this study is based on Electron Backscatter Diffraction (EBSD) and Differential Aperture X-Ray Microscopy (DAXM) data. Slip transfer activity was analyzed at various grain boundaries using Schmid factors based on the simulated local stress tensor. Simulated accumulative shear on various slip systems was also used to assist the analysis of dislocation activity at various grain boundaries. Correlations between simulated strain distribution and experimental observations were assessed to develop better understanding of the effect of grain boundaries on local deformation. This research was supported by DOE/BES grant DE-FG02-09ER46637, and the DAXM characterization at the Advanced Photon Source was supported by DOE contract DE-AC02-06CH11357.
||Planned: EPD Congress Volume