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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Phase Transformation Across Multiscale Material Interfaces
Presentation Title Interdiffusion and Kinetics Study of Ti-Al Intermetallic by Brazing
Author(s) Sutinee Sujittosakul, Samad Firdosy, Kevin Yu, Kevin Smith, Brian Phan, Sevan Chanakian, Vilupanur Ravi, Terry Hendricks, Jean-Pierre Fleurial, Thierry Caillat, Ike Chi
On-Site Speaker (Planned) Sutinee Sujittosakul
Abstract Scope The joining of titanium and its alloys is an important process utilized in aerospace, marine, chemical and biomedical applications. Al-based filler metals are attractive because of the relatively low brazing temperatures (600-750C) needed to form successful joints. In this study, we report on the Ti to Ti interface in joints using Al-based filler metal. Brazing was done under high vacuum at 550 – 650C for various hold times. The cross-section of the bond interface was analyzed using optical microscopy and SEM/EDS. In addition, long term annealing and the addition of impurities, i.e. Mg, Cr, Si, Fe, in the Al filler metal were studied to understand kinetics and layer growth. The SEM/EDS results indicate that TiAl3 is the most prominent phase formed at Ti-Al interface. Annealing for 48 h results in voiding and the thickening of TiAl3 layer. The effect of impurities on Ti-Al layer growth is discussed.
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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