|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Phase Transformation Across Multiscale Material Interfaces
||Microstructural Characterization of Linear Friction Welded Interfaces in Ti-based Alloys
||Talukder Alam, Srinivas Aditya Mantri, Thomas Broderick, Rajarshi Banerjee
|On-Site Speaker (Planned)
Solid state welding of Ti-based alloys is a major thrust area under the broader scheme of additive manufacturing research initiative. Two examples of similar-alloy welds of commercial Ti-alloys by Linear Friction Welding (LFW) are provided here: Ti-6246 and Ti-17. Both set of welds revealed multiscale microstructural features as a result of experiencing different thermal peaks and mechanical stress, with respect to the weld interface distance. In addition to the gradual change in beta grain size throughout the heat-affected zone, non-equilibrium phases that are thought to be martensite-like phases are observed in the region near the weld-interface. Alpha-beta processed Ti-6246 weld shows the existence of “ghost-alpha”, and for the first time its chemistry was measured by the atom probe microscopy. Experimental information obtained about the morphology, structure, and chemistry of the various phases will be used for modelling and predicting the microstructural evolution behavior during the LFW process.
||Planned: Supplemental Proceedings volume