|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Thermo-mechanical Response of Materials with Special Emphasis on In-situ Techniques
||Local Dislocation Configurations and their Contribution to Early Stage Globularization in Alpha Beta Titanium Alloys
||Victoria Miller, Adam Pilchak, Jordan Moering
|On-Site Speaker (Planned)
In alpha + beta titanium alloys, thermomechanical processing is employed to transition from a lamellar to an equiaxed microstructure in order to produce a desirable combination of strength and ductility. The late stages of this globularization process are largely driven by boundary energy; however the early stages are less well-characterized but understood to be dominated by a reduction in stored deformation energy. However, it is these early stages which ultimately determine the differences in globularization kinetics between different colonies, which can lead to undesirable inhomogeneities and incomplete spheroidization under certain processing conditions. In this work, the early dislocation-driven stages of globularization are examined as a function of colony characteristics. The contributions of local dislocation substructure are examined using a combination of transmission electron microscopy alongside in situ and ex situ electron backscatter diffraction.
||Planned: Supplemental Proceedings volume