|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||In-situ Methods for Unraveling Structure-Property Relationships in Light Metals
||I-19: Development of Plasticity Models via Point-by-Point Comparison with HREBSD and Microscale DIC
||Timothy Ruggles, Geoffery Bomarito, Jacob Hochhalter, Saikumar Yeratapally
|On-Site Speaker (Planned)
Advances in microscopy methods have led to an abundance of microstructural information. Attempts to incorporate this information into plasticity models often involve vast reduction of data in order to fit simplified constitutive laws or the use of computationally expensive inverse finite element methods. Coupling of two developing microscopy techniques, high resolution electron backscatter diffraction (HREBSD) and microscale digital image correlation (DIC) provides a unique way to avoid inverse methods without unnecessary data reduction. Using the concurrent measurements of dislocation density from HREBSD and full-field deformation mapping from DIC, hardening rules may be calibrated directly from each point in the microstructure, without the need of a finite element method. To test this concept, an AlCu oligocrystal single edge notch specimen is examined with HREBSD before and after deformation and DIC is performed in situ using an optimized microscale stamp pattern which is then removed for the final HREBSD step.