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Effect of neutron irradiation damage on the microstructural and mechanical properties of precipitation hardened Inconel 718 produced by laser-based additive manufacturing techniques
Graham, Mark W.
Graham, Mark W.
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2023
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The unique cellular structure of Additively Manufactured (AM) alloys produced by laser-based processes may enable the production of parts with improved radiation resistance for nuclear applications. It may be possible to manipulate the microstructure of AM parts during production to optimize features that resist neutron radiation damage in the resulting material. The ability to produce customized microstructures through additive manufacturing may allow the development of parts with enhanced irradiation damage tolerance, which would facilitate the design and implementation of advanced nuclear reactors.
This thesis project explores the possibility of producing neutron irradiation damage resistant materials by laser-based additive manufacturing processes and contribute to the validation of precipitation hardened Inconel 718, Inconel 625, and stainless steel 316L produced by laser-based additive manufacturing techniques for use in nuclear reactor environments. This includes characterizing the microstructural and mechanical properties of Inconel 718, Inconel 625, and stainless steel 316L produced by Laser Powder Bed Fusion (LPBF) and Laser Powder Feed (LPF), as well as evaluating the impact of varying doses of neutron radiation on the mechanical properties of these materials. This work is an important first step in characterizing characterize the post-irradiation physical properties of these AM alloys to determine the viability and possible advantages of these materials in neutron irradiation environments.
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