| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Microstructural and Mechanical Long-term Stability of AM Materials
|
| Presentation Title |
Enhancing Creep Resistance of AM Superalloys Through Inter-Layer Mechanical Working |
| Author(s) |
William Sean James, James German, Supriyo Ganguly, Goncalo Pardal |
| On-Site Speaker (Planned) |
William Sean James |
| Abstract Scope |
This study investigates the constant load creep behaviour of Wire-Arc Additive Manufactured (WAAM) superalloys. Samples from Rene 41, and Haynes 188 were produced using WAAM and subjected to inter-layer machine hammer peening (MHP) to enhance mechanical properties. MHP, an alternative to rolling, has greater flexibility for part design and can easily be applied to large-scale geometry.
Creep tests were conducted under constant load at various temperatures to simulate high-stress environments typical of aerospace applications. Results showed that MHP significantly improved creep resistance compared to traditional heat-treated and non-worked WAAM materials. Microstructural analysis revealed that MHP disrupted the typical dendritic grain structure, promoting more uniform grain boundaries and reducing defect formation. This enhanced microstructural stability contributed to better creep performance, particularly in precipitation-strengthened alloys. These findings suggest that integrating MHP with WAAM can produce superalloy components with superior high-temperature performance, making them suitable for demanding high-speed aerospace structures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Mechanical Properties |