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

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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.