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

修复航空航天和陆基应用中使用的高温合金部件是降低运营成本和延长其使用寿命的可行途径。目前使用的维修程序是多年来从工业经验和技术诀窍以及昂贵和耗时的试错方法相结合而开发的。缺乏解决多元高温合金系统修复过程中涉及的一些关键基本现象的知识和模型是主要原因之一。该提案由Liburdi涡轮服务公司和麦吉尔大学共同设计，将填补现有的知识空白，允许开发更严格和系统的方法来设计和优化修复合金及相关工艺参数。有待探索的现象包括液-固相互作用(润湿、扩散、渗透)和熔点降凝剂物种的扩散及其对液相特性演变的影响。将获得的基本知识将用于了解组织的演变，以及多组分修复接头的室温和高温力学性能。LTS将在拟议的研究中发挥关键作用，因为他们看到了保持其在涡轮机维护、维修和大修领域的竞争力和技术领先地位的途径。这些关系将有助于潜在地重新访问他们目前的修复技术，并在未来配方和相关工艺参数的设计中发挥作用。这项研究的传播将有助于保持加拿大在材料工程和材料加工领域的世界领先地位。

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.