About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development VII – Design With Multi-Modal and Field Data by Integrating Uncertainty
|
| Presentation Title |
Co-sintering optimization and mechanical properties of SS316L/IN718 metal layered composite fabricated by material extrusion additive manufacturing |
| Author(s) |
Do Won Lee, Sang-Ho Oh, Jeong Ah Lee, Hyoung Seop Kim |
| On-Site Speaker (Planned) |
Do Won Lee |
| Abstract Scope |
Material extrusion (MEX) additive manufacturing offers a cost-effective and scalable route for fabricating dissimilar metal composites without requiring compositional gradients. Among these, SS316L and IN718 are of particular interest due to their excellent mechanical strength, corrosion resistance, and thermal stability. In this study, SS316L/IN718 layered composites were fabricated via MEX, and the co-sintering process was optimized to suppress interfacial defects such as delamination and phase instability. Thermal module (DICTRA) diffusion simulations revealed interdiffusion of Fe and Ni near the interface, consistent with experimental EDS results. These compositional gradients were found to promote intermetallic phase formation, including Laves and γ'/γ'' phases, especially at elevated temperatures. The formation of intermetallic layers was found to induce localized strain gradients and stress partitioning, contributing to hetero-deformation induced strengthening. This study provides an integrated modeling–experimental approach for optimizing co-sintering conditions and understanding interfacial behavior in dissimilar metal composites produced by MEX. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Composites, Characterization |