Advanced Joining of Gamma Prime Precipitation Strengthened Cobalt-base Superalloy

加拿大航空航天部门的飞机发动机和部件维护、维修和大修活动创造了超过30亿美元的年收入。γ具有更高熔化温度的沉淀强化钴基高温合金的能力，增加了这些材料的性能超过并取代目前在航空航天和发电应用的下一代燃气轮机发动机中使用的一些镍基高温合金的可能性。然而，为了充分开发这些新兴高温合金的巨大潜力，有必要深入研究先进的连接技术在制造和修复由这些材料制成的受损发动机部件时的适用性。不幸的是，在过去的40年里，高温合金的发展取得的进步并没有与这些先进材料的适当连接技术的发展充分匹配。

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.