|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||Investigating Surface Deformation and 3D Microstructure in Polycrystalline Metals
||Zhe Chen, Samantha Daly
|On-Site Speaker (Planned)
In this study, the full-field heterogeneous deformation of polycrystalline metals including titanium alloys and magnesium alloys during in-situ mechanical loading was examined by scanning electron microscopy combined with digital image correlation (SEM-DIC). SEM imaging was customized by an external scan control system to reduce the global imaging distortion and local imaging noise. This facilitates the investigation of a large sample area through improved stitching of images of adjacent areas of interest, and result in an improved resolution of the strain measurement at earlier stages of deformation. Electron backscattered diffraction (EBSD) combined with femtosecond laser ablation assisted serial sectioning was used to reconstruct post-deformation microstructure in 3D. The deformation behavior such as strain localization, slip transmission, twin activation, and their interaction was investigated and correlated with 3D microstructural features. The experimental results were compared with a crystal plasticity finite element model developed in an integrated computational materials engineering (ICME) framework.
||Planned: Supplemental Proceedings volume