|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation Mechanisms
||From Micro-Cantilever Testing to Deformation Patterning in Hexagonal Polycrystals
||Jicheng Gong, Rajesh Korla, Mitchell Cuddihy, T Ben Britton, Fionn PE Dunne, Angus J. Wilkinson
|On-Site Speaker (Planned)
We have been trying to better understand and model the heterogeneous patterns of stress, strain and dislocation density that develop during deformation of HCP polycrystals. Micro-scale cantilever bend tests are used to probe the considerable anisotropy of elastic and plastic deformation behaviour in these HCP metals. It is necessary to understand and account for the considerable size effect on strength in such tests so as to extract valid critical resolved shear stress (CRSS) values for each of the important slip systems which are required inputs for constitutive laws in crystal plasticity finite element analysis (CP-FEA). Using data from Zr it will be demonstrated that this approach generates CRSS values which allow the bulk flow stresses of macroscopic polycrystal aggregates to be captured by CP-FEA simulation with no additional fitting parameters. At the microscale deformation patterning in the CP-FEA simulations is benchmarked using HR-EBSD analysis of deformed polycrystals.
||Planned: Supplemental Proceedings volume