Development of Post Additive Manufacturing Treatments to Enhance Mechanical Properties of IN 718 Superalloy

添加制造(AM)，俗称3D打印，由于其能够生产更坚固、更轻的创新部件，正在给许多行业的制造流程带来革命性的变化。AM已经成为生产塑料部件的流行材料，但当它可以用于生产创新应用的先进材料时，将产生更大的商业影响，包括在航空航天工业中。AMM目前可以用来生产具有复杂几何形状的金属部件，而这些部件几乎不能用其他制造工艺来生产。然而，尽管产品可以生产出所需的几何形状和尺寸，但满足航空航天工业的严格性能要求仍然是一个相当大的挑战。经AM加工的航空发动机用镍基高温合金，由于内部缺陷，如气孔、裂纹和有害微观成分的形成，容易产生较低的机械强度。Precision ADM是一家加拿大公司，帮助他们的客户公司利用先进的数字制造技术，包括AM拟议研究的目的是使用创新的AM热机械处理来有效消除气孔、裂纹、残余应力、有害微观成分，并改善航空航天最广泛使用的高温合金IN 718的力学性能。人工神经网络(ANN)建模将被用来优化AM参数，并将进行系统研究，以使用高温施加压力来消除缺陷，去除有害微组分，并促进合金中必要强化相的形成。这将使开发出一种有效的程序，消除降低机械性能的主要问题，并使Precision ADM能够向其客户提供具有可靠性能的专业产品。在加拿大发展AM能力将导致航空航天工业的重大经济增长，并有助于加拿大在先进制造技术方面的竞争力。

Additive manufacturing (AM), commonly known as 3D printing, is revolutionizing the manufacturing processin many industries, due to its capability to produce innovative parts that are stronger and lighter. AM hasbecome popular for producing parts from plastics but will have a much greater commercial impact when it canbe used to produce advanced materials for innovative applications, including in the aerospace industry. AMcan currently be used to produce metallic components with complicated geometries that are almost impracticalto produce by other manufacturing processes. However, while a product can be produced with desiredgeometry and dimensions, meeting the rigorous performance requirements of the aerospace industry remains aconsiderable challenge. Nickel-based superalloys processed by AM for aeroengine applications are prone tohaving lower mechanical strength due to internal defects, such as porosity, cracks, and formation of deleteriousmicroconstituent. Precision ADM is a Canadian company that helps their customer companies to takeadvantage of advanced digital manufacturing technologies, including AM. The aim of the proposed research isto use innovative AM thermo-mechanical treatments to effectively eliminate pores, cracks, residual stresses,deleterious microconstituent, and improve mechanical properties of the most widely used aerospace superalloy,IN 718. Artificial neural network (ANN) modeling will be used to optimize the AM parameters and asystematic study will be performed to use imposed pressure at elevated temperatures to eliminate defects,remove deleterious microconstituent, and enhance the formation of essential strengthening phases in the alloy.This will enable the development of an effective procedure that eradicates major problems that degrademechanical properties and enable Precision ADM to provide specialized products with reliable properties to itscustomers. Developing AM capabilities in Canada will lead to major economic growth in the aerospaceindustry and aid Canada's competitiveness in advanced manufacturing technology.