Relation between heat treatment and mechanical properties for additively manufactured Aluminum Alloy 356 for Aerospace Applications

增材制造 (AM) 是指一类新兴技术，通过以逐层方式受控添加材料来构建 3D 物体，以生产达到或接近最终形状的物体。这项颠覆性技术将对航空航天业产生重大影响。铝合金 (AA) 在轻量化航空航天部件中发挥着关键作用，其中大部分应用都由 A356 合金覆盖。然而，迄今为止，大部分工作都集中在传统的热处理上，人们发现这种处理会产生非最佳的机械响应。在此背景下，该提案将解决现有的知识差距，将增材制造专用热处理过程中形成的微观结构与机械性能联系起来，旨在生产具有改进的静态和循环机械性能的增材制造零件。所有工业合作伙伴，即瑞声科技、贝尔直升机德事隆加拿大有限公司、普惠加拿大公司、雷尼绍和 FusiA 都带着各自应用领域的具体目标进入该项目。其中包括提高知识以更好地加工这种合金，以提高增材制造在铝转化领域的采用率。所使用的载体是开发一种低成本途径来提供备用遗留部件和/或开发轻质优化部件以生产更环保的发动机/航空结构。 Ma Brochu教授和My Brochu教授将加强他们对增材制造在新型热处理开发领域的了解，并了解增材制造零件的循环行为。

Additive Manufacturing (AM) refers to an emerging class of technologies that build 3D objects by the controlled addition of materials in a layer-by-layer fashion to produce objects at or near their final shape. This disruptive technology will significantly impact the aerospace industry. Aluminum alloys (AA) play a key role in lightweight aerospace components, where the bulk of the applications are covered by A356 alloy. However, to date, the bulk of the works have focused on traditional heat treatments, which were found to produce non-optimal mechanical response. In that context, this proposal will address the existing knowledge gaps linking the microstructure developed during AM-specific heat treatments with the mechanical properties with the aim of producing AM parts with improved static and cyclic mechanical properties. All industrial partners, i.e. AAC, Bell Helicopter Textron Canada Limited, Pratt Whitney Canada, Renishaw and FusiA are entering the project with specific objectives from their respective field of use. These include improving the knowledge to better process this alloy to increase the adoption rate of AM in the Al transformation sector. The vector used is to develop a low-cost avenue to provide spare legacy components and/or develop lightweight optimised parts to produce greener engines/aerostructures. Prof. Ma Brochu and Prof. My Brochu will strengthen their knowledge on AM in the field of new heat treatment development and understand the cyclic behaviour of AM parts.