| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Accurate Prediction
|
| Presentation Title |
Fatigue Properties of Laser-Powder Bed Fusion Fabricated Dissimilar IN718/SS316 Components |
| Author(s) |
Sumit Choudhary, Vidit Gaur |
| On-Site Speaker (Planned) |
Sumit Choudhary |
| Abstract Scope |
This research examines the role of the interface in the fatigue behavior of L-PBF components joining dissimilar materials (IN718 and SS316L). As-built samples displayed a yield strength of 610 MPa, ultimate strength of 720 MPa, and elongation of 15%. Microstructural analysis focused on the interface, revealing small cracks near the IN718 side and an average interface hardness of 270 HV0.5 with a grain size of 29 µm. Heat treatment aimed to improve interface properties by dissolving detrimental phases. While grain size increased to 38 µm, and intermetallics disappeared, heat-treated samples exhibited a slight decrease in ultimate strength (3%) and a more significant reduction in yield strength (26%). Interestingly, fractures shifted from the interface in as-built samples to the SS316L region after heat treatment. This suggests improved interface strength but necessitates further investigation into the observed strength changes |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Other |