Hybrid Modeling the Influence of Post Processing Heat Treatments on the Strengthening Mechanisms of Additively Manufactured Inconel 718

Abstract

Due to the layering nature of additive manufacturing, additively manufactured parts exhibit a unique microstructure and are more susceptible to defects. Post-processing heat treatments of additively manufactured parts have shown great promise in improving their quality and reliability. However, the previous studies presented here demonstrated that additively manufactured parts respond to heat treatments differently compared to their traditional counterparts. This demonstrates a need for models that can predict the influence of different heat treatments on the mechanical behavior of additively manufactured parts. A hybrid approach between data-driven and physically informed models was adopted to model the influence of post-processing heat treatments on the strengthening mechanisms of additively manufactured Inconel 718. This work focuses on Inconel 718 for its common use in additive manufacturing and because it is one of the most studied additively manufactured alloys which resulted in producing more data that can be used to model its behavior.

Recent Advancements in Post Processing of Additively Manufactured Metals Using Laser Polishing

“…Nickel-based superalloys are distinguished by their exceptional combination of hightemperature strength, hardness, and corrosion or oxidation resistance. These alloys are widely used in power generation and aviation turbines, rocket engines, and other challenging environments, such as nuclear power plants and chemical processing facilities [8,[55][56][57].…”