About this Abstract |
Meeting |
MS&T21: Materials Science & Technology
|
Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond II
|
Presentation Title |
Interstitial Induced Transformations in Nb-Ti Alloys |
Author(s) |
Ravit Silverstein, Anirudh R. Natarajan, Raphaële J. Clément, Anton Van der Ven, Carlos G. Levi |
On-Site Speaker (Planned) |
Ravit Silverstein |
Abstract Scope |
This study addresses the effect of incorporating dilute amounts of oxygen (<1at%) in concentrated Nb-Ti bcc solid solutions as a baseline for subsequent studies in higher order MPEs. Alloys were splat quenched and some were either encapsulated and exposed to 16O infusion, or crushed into powders using a hydriding/dehydriding method and exposed to 17O for NMR studies. The study shows that oxygen incorporation induces a miscibility gap with potential for spinodal decomposition around the equiatomic composition. A dominant transformation mechanism for the Ti-rich phase from bcc to hcp involves a Burgers shuffle along (110) planes. For powders generated through hydriding/ dehydriding there is an alternate path generating omega phase. The transformation paths and resulting microstructures are discussed. |