| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
| Presentation Title |
Isothermal and Thermomechanical Fatigue of Additively Manufactured Nickel-Based Superalloy IN939 |
| Author(s) |
Ivo Kubena, Markéta Gálíková, Ivo Šulák |
| On-Site Speaker (Planned) |
Ivo Kubena |
| Abstract Scope |
Nickel-based superalloys are the primary materials for components required to withstand high-temperature exposure and loading. Since they exhibit exceptional resistance to oxidation, elevated temperatures, creep and possess remarkable mechanical strength, these alloys find extensive use in various fields, particularly in engines, hot sections of turbines, nuclear reactors, and aerospace components. Recently, the processing parameters of laser powder bed fusion technology were optimized to prepare defect-free bulk IN939 superalloy.
The microstructure of the additively manufactured IN939 after typical heat treatment consists of elongated grains and mild texture <001> parallel to the building direction. The bimodal distribution of strengthening precipitates was determined. The isothermal low cycle fatigue at 800 °C and thermomechanical fatigue in the in-phase and out-of-phase regime in the temperature range of 400 – 800 °C were measured. The microstructure before and after loading was evaluated and differences in the microstructural evolution were attributed to differences in mechanical loading. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Mechanical Properties, High-Temperature Materials |