|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||High-temperature In-SEM Mapping of Early Damage Accumulation across Length Scales in CMCs
||Jared Tracy, Kathy Sevener, Samantha Daly
|On-Site Speaker (Planned)
High temperature applications of CMCs necessitate a rigorous understanding of the fracture and damage mechanisms that occur under thermo-mechanical loading, requiring the development of advanced small-scale characterization approaches. In this work, fiber-reinforced SiC/SiC tensile specimens were loaded in a SEM at 800°C, and full-field deformation maps at the constituent length scale were generated using distortion-corrected digital image correlation (SEM-DIC). A colloidal system containing mechanically milled titanium nanopowder, bicine and water was created for use as a deformation tracking pattern that is stable at elevated temperature. The resultant full-field strain maps provide a constituent level characterization of damage evolution in CMCs from crack initiation through final fracture. The importance of examining early damage accumulation and evolution across the constituent, laminate, and lamina length scale will be discussed, with examples of information that can be garnered at the different length scales and their interactions.
||Planned: EPD Congress Volume