|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Deformation and Transitions at Interfaces
||Mesoscale Response of Titanium Alloy Tensile Samples Measured through High Energy X-ray Experiments
||Joel Bernier, , Todd Turner, Darren Pagan, David Menasche, Robert Suter, Peter Kenesei, Jun-Sang Park, Jonathan Almer
|On-Site Speaker (Planned)
High energy synchrotron x-ray characterization methods have been utilized to map the 3D microstructure and evolving intergranular elastic strain state of a single phase polycrystalline titanium alloy tensile specimen. The stress state of individual grains is found to deviate significantly from the macroscopic applied boundary conditions due to the influence of the local grain neighborhood. The experimental data was used to calibrate and benchmark a crystal plasticity finite element model. The combined experimental and simulation results indicate that the residual stress state in the material prior to starting the mechanical test also had an influence on the micromechanical state of the sample during loading. Finally, we explore the use of a line focused x-ray beam to measure grain cross-section averaged elastic strains/stresses, resulting in sub-grain resolution in the direction orthogonal to the plane of the x-ray beam (along the sample tensile axis).