|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Titanium Technology
||Modeling local stress states near microtextured regions in Ti64 and implications on dwell fatigue life.
||Joseph Wendorf, Jean-Charles Stinville, Marie-Agathe Charpagne, McLean Echlin, Andrew Polonsky, Paul Dawson, Tresa Pollock
|On-Site Speaker (Planned)
Titanium alloys have been extensively used throughout the cold section of jet engines for several decades due to their high strength to weight ratio and excellent fatigue performance. However, many titanium alloys develop microtextured regions (MTRs) during forging which significantly reduce dwell fatigue life. 3D EBSD datasets collected via Tribeam tomography enable characterization of the overall millimeter scale 3D structure of MTRs at high enough resolution to also study the micron scale structure of individual grains and grain neighborhoods. Finite element analysis is performed on experimentally collected 3D microstructures of microtextured Ti64 to model the deformation behavior of MTRs and predict likely dwell fatigue crack initiation sites based on several mechanical metrics. The influence of MTR orientation and arrangement on these metrics, as well as the role of MTR boundaries and misoriented grains within MTRs will be discussed.
||Mechanical Properties, Modeling and Simulation, Titanium