About this Abstract |
Meeting |
Superalloys 2024
|
Symposium
|
Superalloys 2024
|
Presentation Title |
Improving Repair Braze Gap Strength Through the Development of a Novel Superalloy Filler |
Author(s) |
Dirk Wilhelm Reker, Roman Sowa, Caspar Schwalbe, Bernd Boettger, Frank Seidel, Marco Panella, Kai Moehwald, Martin Nicolaus, Wolfgang Tillmann |
On-Site Speaker (Planned) |
Dirk Wilhelm Reker |
Abstract Scope |
Superior repair technology is a principal driver for resource-effective operation in the aviation industry. Routine operation of aircraft engines exposes the turbine components to high stresses and high temperatures. To withstand extreme operational conditions Ni-based superalloys are used to manufacture turbine components. A crucial factor in targeting the assurance of repair reliability is improving the repair braze gap strength. This study seeks to improve the braze repair strength by optimising a novel superalloy filler material. The superalloy filler material acts as a complementary additive, that is blended with the braze alloy in powder form and improves the joint properties after brazing. The novel superalloy filler was developed by materials simulation using the CALPHAD (CALculation of PHAse Diagram) approach. Phase field modelling using MICRESS® was applied to study the brazing kinetics and microstructure evolution. The developed superalloy filler was experimentally validated in respect to microstructure improvement and mechanical potential by tensile testing at elevated temperature (871 °C). The application of the novel superalloy filler shows an increase in ultimate tensile strength in comparison to a conventional braze blend. |
Proceedings Inclusion? |
Definite: At-meeting proceedings |