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

加性制造(AM)指的是一种新兴的技术，它通过逐层有控制地添加材料来制造3D对象，以产生最终形状或接近最终形状的对象。这种颠覆性的技术将对航空航天行业产生重大影响。铝合金在航空航天轻量化部件中起着关键作用，A356合金覆盖了航空航天部件的大部分应用。然而，到目前为止，大部分工作都集中在传统的热处理上，这些热处理被发现产生了非最佳的机械响应。在此背景下，这项建议将解决现有的知识差距，将AM特定热处理过程中形成的微观组织与机械性能联系起来，目的是生产具有改进的静态和循环机械性能的AM零件。所有工业合作伙伴，即瑞声、贝尔直升机德事隆加拿大有限公司、加拿大普惠公司、雷尼绍和FusiA都带着各自使用领域的具体目标进入该项目。这些措施包括提高对这种合金更好地加工的知识，以提高铝转化部门对AM的采用率。所使用的载体是开发一种低成本的途径，以提供备用的遗留部件和/或开发轻量化的优化部件，以生产更环保的发动机/飞机结构。Ma Brochu教授和My Brochu教授将加强他们在新的热处理开发领域中对AM的知识，并了解AM部件的循环行为。

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.