About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture
|
| Presentation Title |
Influence of Surface Topography on Fatigue Behaviour of As-Built Thin-Walled Laser Wire Directed Energy Deposited (LW-DED) AISI 316L Stainless Steel |
| Author(s) |
Srinidhi Sampath, Oliwer Gustavsson, Erik Johansson, David Lindell |
| On-Site Speaker (Planned) |
Srinidhi Sampath |
| Abstract Scope |
Laser wire directed energy deposition (LW-DED) is increasingly viewed as a viable option to print relatively large structures for industrial applications, often with stringent demands on fatigue properties. Several publications describe the development of process maps to obtain defect free deposits and resulting mechanical properties. Specimens are typically machined from thick deposits and maybe heat treated. There is a paucity of data on as-built thin walled structures (<5 mm thickness) without further machining or heat treatment. In this work, stainless steel AISI 316L was deposited as thin walls with a nominal wall thickness of 2 mm. Tensile and fatigue tests at R-value of 0.1 were conducted on as-built as well as machined specimens (to remove the surface topography) along the build direction. Contributing factors to observed fatigue behaviour are explained based on 3D optical scans and multi-scale microstructure analysis to guide future designs. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, Iron and Steel |