| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Materials in Energy Environments II
|
| Presentation Title |
High Temperature Fatigue Crack Growth in Fusion Zones of Additively Manufactured and Electron Beam Welded Nickel-Based Superalloys |
| Author(s) |
Ashok Bhadeliya, Jonathan Schmidt, Julius Raute, Birgit Rehmer, Bernard Fedelich, Torsten Jokisch, Birgit Skrotzki, Jürgen Olbricht |
| On-Site Speaker (Planned) |
Jürgen Olbricht |
| Abstract Scope |
Gas turbine components, made of nickel-based superalloys, undergo material damage due to high temperatures and mechanical stresses. These components need periodic replacement to avoid efficiency loss and failure. Repair of these parts is more cost-effective than replacement. State-of-the-art repair technologies, including additive manufacturing (AM) and electron beam welding (EB), are considered for efficient restoration. However, materials properties mismatches and/or internal defects in repaired parts may expedite crack initiation and propagation, reducing fatigue life. To understand the crack growth behavior in joining zones and predict the remaining life of repaired components, fatigue crack growth (FCG) tests were conducted on nickel-based alloys fabricated and/or joined by AM and EB. The FCG experimental technique was successfully extended by infrared imaging and compliance analyses to capture different crack growth rates in dual-material specimens. Importantly, the crack growth rates were found to be significantly reduced at the interface of AM and cast material. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Joining |