About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
In-Situ Monitoring and Control of Solidification & Deformation Processes in Metal Additive Manufacturing
|
| Presentation Title |
Heat and Beat: New Strategies for Dislocation Density Control in Steels During Laser Powder Bed Fusion |
| Author(s) |
Matteo Seita, Dylan Cuskelly |
| On-Site Speaker (Planned) |
Matteo Seita |
| Abstract Scope |
Controlling the dislocation density in metal alloys is crucial to engineer their mechanical response, their propensity to recrystallise, and the occurrence of certain phase transformations. While traditional thermo-mechanical processes provide a versatile platform to achieve this control, additive technologies—particularly those involving solidification—are less versatile and often impose trade-offs on build quality.
In this work, we explore the processing space available to laser powder bed fusion to tailor the dislocation density in different steels. We combine experiments and computational modelling to study dislocation generation as a function of laser beam properties and laser scan strategy. Crucially, we aim to identify laser processing strategies that maximize dislocation content without compromising on build integrity, with the goal of accelerating in-situ phase transformations for site-specific microstructure control. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Phase Transformations, Solidification |