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

增材制造（AM）是指一种新兴的技术，它通过以一层一层的方式控制材料的添加，以生产达到或接近最终形状的物体，从而构建3D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）在轻型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，到目前为止，大部分的工作都集中在传统的热处理上，这被发现会产生非最佳的机械响应。在此背景下，本提案将解决AM特定热处理过程中形成的微观结构与机械性能之间的现有知识差距，目的是生产具有改进静态和循环机械性能的AM零件。所有工业合作伙伴，即AAC，贝尔直升机德事隆加拿大有限公司，普拉特惠特尼加拿大公司，雷尼绍和FusiA都在各自的使用领域以特定的目标进入该项目。这些措施包括提高知识，以更好地处理这种合金，以提高增材制造在铝转化领域的采用率。所使用的矢量是开发一种低成本的途径，以提供备用的传统部件和/或开发轻量级优化部件，以生产更环保的发动机/航空结构。Ma Brochu教授和My Brochu教授将加强他们在新热处理开发领域的增材制造知识，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.