| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Towards Accurate Prediction
|
| Presentation Title |
High-Temperature Damage Mechanisms in Additively Manufactured Nickel-Based Superalloy IN939 |
| Author(s) |
Markéta Gálíková, Ivo Kuběna, Ivo Šulák |
| On-Site Speaker (Planned) |
Markéta Gálíková |
| Abstract Scope |
Nickel-based superalloys are widely used in applications that require resistance to high temperatures and mechanical loading. These alloys are known for their exceptional resistance to oxidation, elevated temperatures, creep, and mechanical strength, making them suitable for use in not only aerospace components. Although it was initially considered unsuitable for PBF-L, optimization of printing parameters has made it possible to produce defect-free bulk material of IN939 with fine microstructure and minimal defects.
To understand the behavior of PBF-L IN939 under high-temperature low cycle fatigue, thermomechanical loading tests were conducted in both in-phase and out-of-phase conditions, ranging from 400°C to 800°C. It was observed that thermomechanical loading had a more detrimental effect compared to isothermal loading at 800°C. In-phase loading with dominant fatigue-creep interaction was found to be the most damaging at high mechanical strain amplitudes, while out-of-phase loading showed a gradual predominance of fatigue-oxidation interaction at lower mechanical strain amplitudes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Temperature Materials, Additive Manufacturing, Copper / Nickel / Cobalt |