| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Developing Predictive Capabilities
|
| Presentation Title |
Methodology of Low Cycle Fatigue Testing on Thin-walled Stainless Steel 316L Manufactured by Laser Powder Bed Fusion |
| Author(s) |
Cheng-Han Yu, Johan Moverare, Ru Peng, Alexander Leicht |
| On-Site Speaker (Planned) |
Cheng-Han Yu |
| Abstract Scope |
The process of laser powder bed fusion leads to characteristic microstructure of the as-built component, such as high surface roughness, cell structure and high surface residual stress. To examine the microstructural effects on the low cycle fatigue properties when the printed component is close to the dimensional limitation, tubular fatigue specimens with different wall thicknesses, 1mm and 2mm, were tested at room temperature. The advantage of using tubular specimens is to avoid possible buckling when the fully revered fatigue test is carried out. The comprehensive effects of surface roughness and heterogeneous microstructure at different applied strain range are quantified by estimating the fatigue notch factor, Kf, which the influence becomes severe when approaching lower applied strain range. Furthermore, the same fatigue tests have also been applied to a reference group of wrought stainless steel 316L, and a suppressed martensitic phase transformation is observed in the additively manufactured specimens. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Characterization |