| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Neutron and X-ray Scattering in Materials Science and Engineering
|
| Presentation Title |
Redistribution of Residual Stress in Steels during Hybrid Manufacturing |
| Author(s) |
Jeffrey M. Brookins, Mithulan Paramanathan, Thomas Feldhausen, Chris Fancher |
| On-Site Speaker (Planned) |
Jeffrey M. Brookins |
| Abstract Scope |
Hybrid manufacturing merges the high deposition rates of directed energy deposition (DED) platforms with in-line CNC machining; producing geometrically-complex, near-net-shape components. Due to the thermal gradients during deposition, residual stresses are unavoidable in both additive and hybrid manufacturing. However, the interleaving of deposition and subsequent machining adds complexity in controlling the final residual stress state. Iterative deposition leads to multiple start-stops, potentially introducing localized stress hotspots. This study explores these effects by fabricating thin walls of a mild and a precipitation-hardened stainless steel, to investigate the effects of start-stops and surface machining on the redistribution of residual stresses. Bulk and surface stresses, in as-printed and as-machined conditions, were characterized using neutron and X-ray stress mapping; while metallography assessed the effects on microstructural features. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Iron and Steel |