| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Accurate Prediction
|
| Presentation Title |
Effects of Processing Parameters on the Fatigue Life of Additively Manufactured Al10SiMg Alloys |
| Author(s) |
Timothy J. Nice, John O'Connell, Nathaniel Badgett, Bhaskar S Majumdar |
| On-Site Speaker (Planned) |
Timothy J. Nice |
| Abstract Scope |
Laser powder bed fusion (LPBF) additive manufacturing is quickly becoming a sought-after process for manufacturing an increasing number of parts for the aerospace and transportation industries. In these applications, the fatigue performance of lightweight alloys is of critical importance. Here, we present our work on the tension and fatigue life of Al10SiMg alloy as a function of process parameters, to shed insight on the processing window within which adequate fatigue life can be maintained. We found that tensile strength increases with decreasing volumetric energy density up to a point, after which it decreases. Microstructural examination shows that the defect density is consistent with this trend. While the fatigue life is highest for the optimum process condition, at low stress ranges near run-out conditions, the fatigue performance appears relatively unaffected by process conditions. Work with reused powders shows that fatigue life is strongly affected, and points to optimum sieving being important. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Other |