About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Materials Genome, CALPHAD, and a Career over the Span of 20, 50, and 60 Years: An FMD/SMD Symposium in Honor of Zi-Kui Liu
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Presentation Title |
Understanding Interstitial and Substitutional Alloying of Refractory Metals |
Author(s) |
Anton Van der Ven |
On-Site Speaker (Planned) |
Anton Van der Ven |
Abstract Scope |
Refractory metals, including Ti, Zr, Hf, V, Nb and Ta are unique in that they are able to dissolve high concentrations of interstitial carbon, nitrogen and oxygen, leading to intriguing thermodynamic, kinetic and mechanical properties. In view of the increased interest in multi-principal element (MPE) alloys for high temperature structural applications, there is a need to understand the effects of non-dilute concentrations of interstitial alloying elements on refractory alloys. In this talk I will describe the results of first-principles statistical mechanics studies of phase stability of refractory metals alloyed with interstitial C, N and O. Interactions between interstitial and substitutional alloying elements have their origin in electronic structure properties that are specific to early transition metals. The strong interactions between dissolved interstitials and substitutional alloying elements manifest themselves at high temperatures, leading to short-range ordering phenomena that affect phase stability and diffusion |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Temperature Materials, Titanium, Computational Materials Science & Engineering |