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 |
F-56: Directed Energy Deposition of a Medium Manganese Steel: Influence of Processing Parameters on Microstructure and Mechanical Properties |
| Author(s) |
Min Young Lee, Won Hui Jo, Min Yu Kang, Hyo Kyung Sung, Hyun Joo Choi, Soon Jik Hong, Hyoung Seop Kim, Jae Bok Seol |
| On-Site Speaker (Planned) |
Min Young Lee |
| Abstract Scope |
Austenitic medium manganese steel with a composition of Fe-10Mn-10Cr-3Ni (wt%) was fabricated using the DED process. The medium manganese steel possessed a yield strength of 480.1 MPa and an elongation of 37.3%. the formation of spherical oxides, and a tendency for smaller grain sizes at higher scan speeds through SEM. EBSD analysis of tensile-deformed samples showed that the TRIP effect became more intensive as the laser power increased and the scan speed became faster. The collapse of cell boundaries was observed in regions where the cell boundaries intersected with slip. FCC-to-BCC phase transformation initiated at the junction of slip and solute-segregated cell boundaries, with BCC phase spreading into the cell interior. The expectation that the locations where phase transformation occurs are related to the local concentration of internal stress was examined and The quantitative Influence of internal stress on the TRIP mechanism was analyzed by the LUR test. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Phase Transformations |