About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
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Additive Manufacturing, Directed Energy Deposition of Metals: Processing – Microstructure – Mechanical Property Relationships
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| Presentation Title |
Fatigue behaviour of as-built thin-walled laser wire directed energy deposited (LW-DED) AISI 316L stainless steel |
| Author(s) |
Srinidhi Sampath, Oliwer Gustafsson, Erik Johansson, David Lindell |
| On-Site Speaker (Planned) |
Srinidhi Sampath |
| Abstract Scope |
Laser wire directed energy deposition (LW-DED) is a versatile manufacturing method for relatively large structures. Recent publications describe the relation between process, microstructure and mechanical properties. Mechanical testing is typically reported for rather thick deposits from which specimens are machined for testing, in some cases after annealing. Hence, there is a gap in understanding the mechanical properties of as-deposited thin walled structures without further machining and/or heat treatment. In this work, fatigue properties of stainless steel AISI 316L deposits with a nominal wall thickness of 2 mm are reported. Results show that the fatigue properties are lower than the values reported for machined specimens. The influence of surface topology and underlying microstructural features at different length scales on observed fatigue performance is discussed. |