About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder-Based Manufacturing and Repair of Large Structural Components for Critical Applications
|
| Presentation Title |
Investigating DED Repair Strategies in Grooved 316L Stainless Steel for Enhanced Strength-Ductility Synergy |
| Author(s) |
Man Jae Sa Gong, Jeong Ah Lee, Soung Yeoul Ahn, Hyojin Park, Renhao Wu, Rae Eon Kim, Hyoung Seop Kim |
| On-Site Speaker (Planned) |
Man Jae Sa Gong |
| Abstract Scope |
In repair applications, direct energy deposition(DED) has emerged as a promising technique due to its capability to restore damaged areas with precise material placement. Grooving is often employed as a preprocessing step to remove damaged sections, but it introduces challenges related to groove geometry, energy input, and metallurgical bonding. Despite its importance, limited research has addressed deposition behavior in angled regions. This study investigates the effects of DED parameters—specifically laser power, energy input, and sidewall angles—on deposition quality within grooved stainless steel 316L substrates. The repaired regions exhibited improved strength-ductility synergy compared to the wrought base, attributed to microstructural heterogeneity across the groove-deposit interface. Twinning activity and accumulation of geometrically necessary dislocations contributed to hetero-deformation-induced strengthening. Residual stress evolution and crack susceptibility in repaired zones were also assessed. The findings offer valuable insights into optimizing DED repair strategies for groove-based geometries, enhancing mechanical performance and structural integrity for practical applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, |