About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Multiscale and Non-Equilibrium Solidification Fundamentals
|
| Presentation Title |
On Site-Specific Microstructure Control during Laser Powder Bed Fusion of 316L Stainless Steel |
| Author(s) |
Qiuqin Li, Ehsan Farabi, Vitor Vieira Rielli, Kevin D Sisco, Simon Ringer, Sophie Primig |
| On-Site Speaker (Planned) |
Qiuqin Li |
| Abstract Scope |
Additive manufacturing is a promising method for engineering site-specific microstructures and properties in strategic materials such as stainless steels. Such site-specific microstructure control (SSMC) enables overcoming the limitations of property profiles inherent to traditionally manufactured homogeneous microstructures. Achieving SSMC requires better fundamental understanding of how various printing parameters and associated thermal profiles affect the microstructure evolution. We showcase how laser powder bed fusion (L-PBF) parameter control during printing of 316L stainless steel can be used to engineer the dislocation density and grain structure locally. This enables achieving SSMC via variable degrees of recrystallization throughout subsequent heat treatment to generate distinctive microstructures. We apply various advanced characterization tools combined with thermal simulations to unveil the mechanisms of SSMC through linking thermal profiles to the microstructure evolution. These findings demonstrate that controlled tuning of L-PBF parameters enables SSMC over the grain morphology and grain boundary networks, leading to performance-optimized components. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Other |