|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||Microstructure and Deformation Mechanisms in Ti-7Al
||Patrick Callahan, Jean-Charles Stinville, Tresa M Pollock
|On-Site Speaker (Planned)
A Ti-7Al tensile specimen was in-situ tested in an SEM using high resolution digital image correlation (HR-DIC). The alloy had been cast, hot isostatic pressed and extruded into a bar. The alloy displayed significant texture near a <2110> fiber direction along the extrusion direction and a random texture along the transverse direction. A region with a microstructural configuration favorable for developing damage was chosen based on EBSD data collected prior to loading. HR DIC was performed on a large area of approximately 700μm by 850μm. The sample was loaded in tension to macroscopic strains of 0.34%, 0.45%, 0.66%, and 1.11% and HR-DIC measurements were made while loaded and unloaded at each step. Strain localization was observed early in the loading process and was correlated to the microstructure. The degree of localization varied in different grains, and an analysis of slip activity, strain localization, and grain orientation will be given.
||Planned: Supplemental Proceedings volume