About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture
|
| Presentation Title |
High-Temperature Fatigue Behavior of Additively Manufactured Aluminum Alloys |
| Author(s) |
Sumit Bahl, Nicholas A. Richter, Clement Ekaputra, Chris Torbet, Jovid U. Rakhmonov, Yi Feng Su, Alex Plotkowski, Tresa M. Pollock, Amit Shyam |
| On-Site Speaker (Planned) |
Sumit Bahl |
| Abstract Scope |
Additive manufacturing has led to the development of new Al-Ce based alloys offering unprecedented microstructural stability and mechanical properties in the 300 – 400 °C temperature range. The fatigue behavior of Al alloys in this temperature range is not well-understood, as existing commercial Al alloys are typically suitable for use only at temperatures below 250 °C. In this study, we examined the fatigue behavior of additively manufactured AlSi10Mg and Al-7.5Ce-4.5Ni-0.4Mn-0.7Zr (wt%) alloys at 350 °C. The fatigue tests were performed at conventional (20-30 Hz) and ultrasonic (20 kHz) loading frequencies. Al-7.5Ce-4.5Ni-0.4Mn-0.7Zr showed higher fatigue strength on an absolute stress basis, but AlSi10Mg exhibited higher fatigue strength to yield strength ratio. The role of strain-rate sensitivity, creep-fatigue interactions and microstructural features such as grain morphology and nature of intermetallic network (continuous versus discontinuous) on determining fatigue resistance will be discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Aluminum, Mechanical Properties |