Development and characterization of high strength / high temperature powders compositions for additive manufacturing and repair applications

用于增材制造和修复应用的高强度/高温粉末组合物的开发和表征

• 批准号: 539429-2019
• 负责人: Brochu, Mathieu
• 金额: $ 2.19万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=719878
• 关键词: Development; characterization; strength; temperature; powders

Engine turbine components are made of high temperature resistant materials, typically nickel- or cobalt-based superalloys. During service, turbine parts can become damaged resulting in engine operation deficiencies and potential damage to subjacent components. High strength superalloy component manufacture and repair involves the usage of complex multicomponent alloy systems. This stems from the need to match alloy compositions, and for good weldability and mechanical properties. To date, there is a lack of knowledge and models addressing some of the key fundamental phenomenon involved during fabrication for such multicomponent systems. This explains why the current approaches to production are developed from a combination of industrial experience and know how, and costly and time-consuming trial and error approach. This proposal is designed to address the existing knowledge gaps for multicomponent alloy systems, to permit the development of a more rigorous and systematic approach for the design and optimisation of high temperature performance Additive Manufacturing-specific alloys and associated processing parameters. Liburdi Turbine Services (LTS), a division of Liburdi Engineering (Ontario), is the world leader in turbine MRO and turbine blade repair. They see this research as an avenue to maintaining their competitiveness and technological leadership by gaining a fundamental understanding combined with a multicomponent modeling toolkit. In this work, a better understanding of the relationships linking the melting point depressant concentration, and the evolving properties of the liquid as a function of soaking time during the heat treatment for two multicomponent superalloy systems (R142 and RN5) will be provided. Also, the possibility of using the exact powder blend composition, but under the framework of a homogeneous powder feedstock to be used in Laser Powder Bed Fusion and Direct Energy Deposition methods will be evaluated. Success in this objective would allow simplified in-situ repair, without the risks of compositional variation.

发动机涡轮部件由耐高温材料制成，通常是镍基或钴基高温合金。在使用过程中，涡轮部件可能会损坏，导致发动机运行缺陷和潜在的下部件损坏。高强度高温合金部件的制造和维修涉及到复杂的多组分合金系统的使用。这源于需要匹配合金成分，以及良好的可焊性和机械性能。到目前为止，缺乏解决这种多组件系统制造过程中涉及的一些关键基本现象的知识和模型。这就解释了为什么目前的生产方法是由工业经验和技术以及昂贵且耗时的试验和错误方法相结合而开发的。该提案旨在解决多组分合金系统的现有知识差距，以允许开发更严格和系统的方法来设计和优化高温性能增材制造特定合金和相关的加工参数。Liburdi Turbine Services （LTS）是Liburdi Engineering （Ontario）的一个分支，在涡轮MRO和涡轮叶片维修方面处于世界领先地位。他们将这项研究视为通过获得与多组件建模工具包相结合的基本理解来保持其竞争力和技术领先地位的途径。在这项工作中，将更好地理解熔点抑制剂浓度之间的关系，以及两种多组分高温合金体系（R142和RN5）热处理过程中液体性能随浸泡时间的变化。此外，将评估使用精确的粉末混合成分，但在均匀粉末原料框架下用于激光粉末床融合和直接能量沉积方法的可能性。这一目标的成功将允许简化原位修复，而没有成分变化的风险。