Effect of alloying filler materials for repair of turbine engine components utilizing liburdi advanced LPM and laser self-healing processes

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The repair of superalloy components used in the aerospace and land-based applications is a viable avenue for reducing operating costs and increasing their service life. The currently used repair procedures were developed over the years from a combination of industrial experience and know how, and costly and time-consuming trial and error approaches. The lack of knowledge and models addressing some of the key fundamental phenomenon involved during repair of multicomponent superalloy systems is one of the primary reason. This proposal, co-designed by Liburdi Turbine Services and McGill University, will address existing knowledge gaps, permitting the development of more rigorous and systematic approaches for the design and optimisation of repair alloys and associated processing parameters. The phenomena to be explored include liquid-to-solid interactions (wetting, spreading, infiltration) and the diffusion of melting point depressant species along with its influence on the evolving liquid phase characteristics. The fundamental knowledge to be gained will be used to understand the evolution of the microstructure, as well as the room and high temperature mechanical properties of multicomponent repair joints. LTS will play a key role in the proposed research, as they see an avenue to maintaining their competitiveness and technological leadership in the field of turbine maintenance, repair and overhaul. The relationships will be instrumental in the potential re-visiting of their current repair technologies and in the design of future formulations and associated processing parameters. The dissemination of the research will contribute to maintain Canada's position as a world leader in the field of materials engineering and materials processing.