About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
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| Symposium
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Interstitial–Metal Interactions: The Outsized Role of Small Atoms
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| Presentation Title |
Small Atoms, Large Effects: Minor-Element Interactions in Additively Manufactured ODS Superalloys |
| Author(s) |
Andreas Bezold, Subham Chattoraj, Timothy M. Smith, Michael J. Mills |
| On-Site Speaker (Planned) |
Andreas Bezold |
| Abstract Scope |
Oxide dispersion-strengthened (ODS) superalloys drew strong interest in the 1980s due to their outstanding high-temperature creep resistance, but widespread adoption was limited by manufacturing challenges. Recent advances in additive manufacturing have revived ODS concepts, particularly powder-based routes in which resonant acoustic mixing coats alloy powders with yttria before laser powder bed fusion, enabling dense, crack-free builds with finely dispersed oxide nanoparticles. However, this new processing route also raises fundamental questions about how alloying and impurity elements interact with oxide dispersions and influence macroscopic properties. Using additively manufactured ODS alloys, including GRX-810, we examine how C, S, and Si influence oxide crystal structure and chemistry and show how oxide particles can act as impurity-gettering sites. We further demonstrate that minor-element segregation at oxide/matrix interfaces can promote the nucleation of nanoscale carbides and discuss how these interfacial effects might influence high-temperature behavior. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, High-Temperature Materials, Additive Manufacturing |