Advanced Joining of Gamma Prime Precipitation Strengthened Cobalt-base Superalloy

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Aircraft engine and component maintenance, repair and overhaul activities in the Canadian aerospace sector generate over $3 billion in annual revenues. The ability to produce γ’ precipitation strengthened Cobalt-based superalloys with higher melting temperatures has raised the possibility that these materials could out-perform and replace some of the currently used Nickel-based superalloys in next generation gas turbine engines for aerospace and power generation applications. Nevertheless, to adequately exploit the vast potentials of these newly emerging superalloys it is imperative to perform intensive research on the applicability of advanced joining techniques during manufacturing and repair of damaged engine components made from these materials. Unfortunately, the advancements that have occurred over the past four decades on the development of high temperature alloys have not been adequately matched with the development of appropriate joining techniques for these advanced materials.