| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture IV: Toward Confident Use in Critical Applications
|
| Presentation Title |
Fatigue Crack Growth Behavior of DED Type 304L Stainless Steel |
| Author(s) |
Christine Smudde, Christopher San Marchi, Christopher D'Elia, Michael Hill, Jeffery Gibeling |
| On-Site Speaker (Planned) |
Christine Smudde |
| Abstract Scope |
While additive manufacturing (AM) offers technological advancements supporting innovative engineering design, it also introduces challenges in fatigue critical applications. Due to the highly localized heating and the resulting temperature gradients of the manufacturing process, AM materials have unique microstructures and significant residual stresses that influence mechanical properties, including fatigue behavior. In this study, fatigue crack growth resistance of AM type 304L stainless steel produced by directed energy deposition was evaluated. Increasing and decreasing alternating stress intensity factor tests were conducted to provide a complete profile of fatigue crack growth behavior. In addition, constant alternating stress intensity factor tests were used to explore variations in crack growth rates at different locations in the build. Assessments of microstructural features and residual stress in AM type 304L through electron backscatter diffraction imaging and slitting measurements, respectively, support a more complete understanding of the factors affecting the material’s fatigue crack growth resistance. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |