|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||Probing Grain Boundary Mechanics in alpha-titanium Using Nanoindentation and Boundary-sensitive Crystal Plasticity Modeling
||Yang Su, Claudio Zambaldi, David Mercier, Philip Eisenlohr, Thomas Bieler, Martin Crimp
|On-Site Speaker (Planned)
To understand how grain boundaries alter plastic deformation of commercially pure titanium, sphero-conical nanoindentations were placed at preselected grain boundaries where corresponding grain orientations had been mapped by electron backscatter diffraction. Resistance of grain boundaries to slip was characterized by comparing bi-crystal and single crystal nanoindentations surface topographies. The effects of grain boundary misorientation and subsurface inclination (determined by focused ion beam sections) on topography were categorized by a number of slip transmission criteria. Bi-crystal indentation simulations were carried out using crystal plasticity finite element (CPFE) modeling, and the accuracy of the model was evaluated by comparing the simulated and experimentally measured topographies developed across a number of grain boundaries. The effect of incorporating a harder (or softer) layer of material close to grain boundaries into the CPFE model was explored.
This work was supported by NSF Materials World Network Grant DMR-1108211 and corresponding Deutsche Forschungsgemeinschaft (DFG) grant ZA523/3-1.
||Planned: EPD Congress Volume