About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Materials and Manufacturing in Low Earth Orbit (and Beyond)
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| Presentation Title |
Oxide Dispersion Strengthening via Additive Processing: A Revolutionary New Approach for High Temperature Alloys |
| Author(s) |
Michael J. Mills, Andreas Bezold, Subham Chattoraj, Timothy M. Smith, Calvin M. Stewart, Stephen Niezgoda, Emmanuelle Marquis |
| On-Site Speaker (Planned) |
Michael J. Mills |
| Abstract Scope |
While oxide dispersion strengthening (ODS) is one of the most effective means of producing creep-resistant alloys, its widespread deployment has been limited by the complex, conventional processing route. A new route for synthesizing ODS alloys using laser powder bed fusion has recently been developed by collaborators at NASA Glenn Research Center and was utilized to design an ODS solid solution alloy (GRX-810) with exceptional high-temperature properties. Detailed electron microscopy analysis has been performed on GRX-810 to characterize the oxide dispersoids, other minor grain boundary phases and the large dislocation density created during the build process. These microstructure insights are being used to rationalize the remarkable stabilization of the dislocation substructure and the significantly improved creep resistance of GRX-810 in comparison to a model NiCoCr ODS alloy. The present status of this work, understanding of strengthening mechanisms, and prospects for developing a wider range of ODS-strengthened alloys will be discussed. |