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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium 2026 Technical Division Student Poster Contest
Presentation Title SPG-46: Metastable Phase Control in Laser Powder Bed Fusion Stainless Steel 316L
Author(s) Brandon King, Noah Montrose, Mike Hurley, Brian Jaques
On-Site Speaker (Planned) Brandon King
Abstract Scope Additive manufacturing (AM) of stainless-steel 316L (AISI 316L) often results in metastable phase formation, where the typical austenitic face-centered cubic (FCC) phase can transform to ferritic body-centered cubic (BCC) or martensitic body-centered tetragonal (BCT) phases, yet the mechanisms that govern ferrite and martensite stabilization within AM Laser-Powder-Bed-Fusion (LPBF) remain poorly understood. During LPBF of stainless steel the rapid solidification of the melt pool offers a novel method to directly produce metastable ferrite or martensite and an alternative to previous mechanisms which included heat treatment, irradiation, or induced strain. A novel method of phase stabilization introduces new ability to create hierarchical microstructures to optimize component performance. This research aims to address the gap between LPBF melt pool dynamics and phase stability by tailoring volumetric energy density (VED) and laser rescanning parameters to create FCC and BCT phases.
Proceedings Inclusion? Undecided
Keywords Additive Manufacturing, Phase Transformations, Characterization

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