About this Abstract |
Meeting |
MS&T23: Materials Science & Technology
|
Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond IV
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Presentation Title |
Nanograin Stabilization in High Entropy Alloy Without the Need for “Extra” Solute |
Author(s) |
Moses Awenbiik Adaan-Nyiak, Ahmed Alade Tiamiyu |
On-Site Speaker (Planned) |
Moses Awenbiik Adaan-Nyiak |
Abstract Scope |
Applications of nanocrystalline (NC) materials are limited by the significant grain coarsening they undergo even at low homologous-temperatures. A well-established strategy to address thermal instability in binary systems is by incorporating a solute that can effectively offset the grain-boundary excess energy of the solvent that drives coarsening. However, this approach is considered complex in multicomponent alloys due to the many interactions among the constituting elements that could result in the formation of deleterious secondary phases. Using in-situ x-ray diffraction, scanning/transmission electron microscopy, and atom probe tomography, we show in this study that nanograins in quaternary high entropy alloy (HEA) can be stabilized without the introduction of an “extra” solute through a design strategy that would be discussed. Compared with the literature, the results of the present work show remarkable nanograin stability at high homologous-temperatures. |