About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Materials, Processes and Applications for Energy Industry
|
| Presentation Title |
Optimization of ODS Inconel 939 Produced by SLM for Enhanced High-Temperature Strength |
| Author(s) |
Aylin Aktaş, Hasan Tahsin Koç, Uygar Egemen Yaşar, Parvina Irgasheva, Eren Yunus Kalay |
| On-Site Speaker (Planned) |
Aylin Aktaş |
| Abstract Scope |
Inconel 939 alloys are widely used in aerospace and energy sectors for its excellent high-temperature strength and corrosion resistance. However, their service temperatures are limited around 850°C. This study explores enhancing its performance by applying oxide dispersion strengthening (ODS) combined with selective laser melting (SLM) additive manufacturing. ODS IN939 samples were fabricated following optimized ball milling and processing parameters to refine melt pool dimensions, encourage γ'(Ni₃Al(Ti)) phase formation, and reduce porosity. SEM, EBSD, and TEM revealed a uniform distribution of nano-oxides with a nanoparticle density of 9.9±3.1×10¹²m⁻² and average particle size of 28.8±14.8nm. Room temperature mechanical properties showed minimal changes, tensile tests at 800 °C demonstrated significant strength improvements, with yield strength and ultimate tensile strength increased by approximately 20.1% and 14.7%, respectively, in as-built ODS specimens. Mechanical properties of as-built and heat-treated samples will be discussed, underscoring the promise of ODS combined with SLM to extend IN939’s high-temperature capabilities. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, High-Temperature Materials |