aim


International conference GAT-2020 is aimed to steer the R&D directions to the target-oriented R&D (ToRD) processes that accelerate, or make possible, the development of gammalloy materials with distinctly greater service temperatures and/or reliability. It will also look for subsequent/parallel opportunities in identifying diversified R&D areas in relevant fundamentals as well as supportive technologies.
 

BACKGROUND


Gamma TiAl alloys, called Gammalloys, are emerging as new metallic high temperature structural materials that replace superalloys in certain applications. Their recent applications in aero-engine low pressure turbine (LPT) blades for intermediate service temperatures (<750 °C) and automotive valves and turbocharger (TC) wheels for higher temperatures (800 - 1000 °C) began to establish the foundations of gammalloy materials-processes manufacturing technology. As the application expands massively into several major engine LPTs, demands and the long-lasting desire for higher-temperature capable gammalloy materials have become even greater. Up to now, however, no such gammalloy materials have been realized for aero-engine rotational component applications. This situation has been frustrating and disappointing because in the '90s their use temperatures were demonstrated to reach potentially 900 °C and because ever since a great deal of worldwide R&D efforts has been made toward the development of such gammalloy materials. On the other hand, service temperatures for the automotive engine components have been gradually raised over the last 15 years through compositional adjustments, however, at the expense of the reliability, which has slowed wide-spread adoption.
 

Topic Areas

 

GAT-2020 deals with Gammalloys and their Composites based on γ-TiAl. It will also include alloys based on Orthorhombic Ti2AlNb. The topic areas include all related areas including:

  1. Advances in the understanding of Composition-Microstructure-Property Relationships;
  2. Advances in designing Alloy-Process-Microstructure-Property Combinations that will yield balanced improvements in performance of current engineering alloys or newly developed alloys;
  3. Recent understanding of the Importance of Damage and Its Tolerance;
  4. Advances in Cost-effective or Performance-Improving Processing: Casting (Near-Net or Net), Melting and Ingot Production, Wrought Processing and Forming, Sheet Forming and Fabrication, Powder Metallurgy, and Application or Component-specific Heat Treatments;
  5. Advances in Innovative Processing and/or Manufacturing: Additive Manufacturing Processes, Grain Refinement, etc.;
  6. Improved or new Automotive Engine Component-Specific Alloy-Process-Microstructure Combinations and their expanded Application Possibilities;
  7. Advances in Peripheral or Supporting Technologies (Machining, Joining and Others);
  8. Progress in the Understanding of Environmental Effects and Surface Protection Methodologies;
  9. Application Efforts and Applications (Aerospace, Automotive, Land-Base Turbine, and Others);
  10. Progress in Targeted Fundamental Research in all Areas;
  11. Calculation, Modeling and Simulation Efforts that will help refine or speed up the above Processes and/or Results;
  12. R&D of Other Areas: Orthorhombic Ti2AlNb based Alloys, Biomaterials, Nuclear Reactor Materials, etc.;
  13. New Ideas, Interpretations/Assessments and Challenges.