| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Designing Complex Microstructures through Additive Manufacturing
|
| Presentation Title |
Site-specific Microstructural Control of High Manganese Steel Processed by Laser Powder Bed Fusion |
| Author(s) |
Miroslav Smid, Michal Jambor, Helena Van Swygenhoven, Filip Grygar, Daniel Koutny |
| On-Site Speaker (Planned) |
Miroslav Smid |
| Abstract Scope |
This study presents an LPBF processing approach leading to microstructural control in terms of crystallography and chemical composition applied on high manganese steel. The introduction of an additional laser scanning step (remelting) in selected areas, combined with the volatile nature of manganese, enables the site-specific tuning of local chemical composition. This manganese content decrease is fully dependent on energy input of LPBF and, thus, well-controllable. Moreover, the scanning strategy without typical 66° layer-to-layer rotation can be utilized to modify crystallography of a build to alter mechanical properties further. In such manner, an intentional modification of solidification structure and stacking fault energy can be achieved, leading to locally variable mechanical properties. The presented processing approach enables novel design and fabrication opportunities of metal parts with complex substructures intentionally selected to enhance certain properties complying with the desired application. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Characterization |