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Meeting 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Symposium 2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
Presentation Title Influence of Porosity on Impact Toughness of Stainless Steel 316L Fabricated via Laser Powder Bed Fusion for Nuclear Applications
Author(s) Rebecca Herrera, Lizbeth Licerio, Ben Hroblak, Justin Miner, Sneha Prabha Narra, James Carney, Francisco Medina
On-Site Speaker (Planned) Rebecca Herrera
Abstract Scope Limited impact toughness data has hindered the adoption of Laser Powder Bed Fusion (PBF-LB/M) Stainless Steel 316L components within nuclear regulatory frameworks, where toughness is critical for irradiation performance. This study investigates the process-structure-property relationships of impact toughness in PBF-LB/M fabricated Stainless Steel 316L, focusing on the impact of the process parameters on the as-built microstructure and subsequent heat treatments on impact toughness. An experiment was conducted varying the scanning velocity to generate differences in porosity and microstructure. Additionally, three distinct heat treatments were conducted to isolate the impact of microstructure from porosity: (i) a treatment that balances between residual stress relief and retention of the as-built microstructure, (ii) a treatment designed to promote precipitation of σ, χ, and carbide phases, and (iii) a treatment intended to dissolve secondary phases. Impact toughness was evaluated using Charpy V-notch testing to quantify the effects of processing and heat treatment on material performance.
Proceedings Inclusion? Undecided

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