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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Phase Transformation Across Multiscale Material Interfaces
Presentation Title Microstructural Characterization of Linear Friction Welded Interfaces in Ti-based Alloys
Author(s) Talukder Alam, Srinivas Aditya Mantri, Thomas Broderick, Rajarshi Banerjee
On-Site Speaker (Planned) Talukder Alam
Abstract Scope 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.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Analysis of the Stability of Interfaces Fabricated Using Solid State Welds
Atom Probe Tomography Study of Interface Diffusion Assisted Self-healing Behaviour of Cr2Al(Si)C MAX Phase Coatings
Atomic-scale Characterization of Solute Segregation in Interfaces in Light Alloys
Effect of Lattice-level Covalent Character on Phase and Interfacial Stability in Mg-alloys
Efficient and Systematic Study of Phase Transformations Using Dual-anneal Diffusion Multiples
Exploiting Non-conventional Pathways for Transformations and Microstructural Evolution in Metastable Beta Ti Alloys
Grain Boundary Microstates under Irradiation: Which Came First?
Interdiffusion and Kinetics Study of Ti-Al Intermetallic by Brazing
Microstructural Characterization of Linear Friction Welded Interfaces in Ti-based Alloys
Modeling of Complexion Transitions at One- and Two-dimensional Defects
Modeling Transitions at Interfaces
Morphological Evolution and Mechanical Behavior of Co-sputtered Cu-Mo Thin Films
Nanoscale Interfacial Phase Structures in Roll-bonded Metallic Glass Composite Materials
Prevention of Coarsening Induced Phase Transformations in Al-Cu Alloys: Role of Interfaces
Roles of Transformation Interface for Controlling Microstructure and Properties of High Strength Steels
Structure and Mechanical Response of Highly Defective Grain Boundaries
Structure and Properties of BCC Mg Synthesized Using Interface Strain Engineering
The Effect of Diffusion on the Microstructure and Properties of a NiAl-based Anchor Phase Coating for CMSX-4
Transient-liquid-phase-bonding and Mechanical Properties of Ni-based-superalloy-H230 for Heat Exchangers in Supercritical CO2 Power Cycles

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