Local structures of the Al-RE marginal metallic glasses and liquids: A molecular dynamics study

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2022-7-7

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Sarıtürk, Doğuhan

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Al-based metallic glasses (MGs) have outstanding structural and functional properties and are of great interest in the literature and industry. The formation of metallic glasses opens up extraordinary possibilities, and the structure and structure-property relationship at the atomic level must be thoroughly studied to tailor such properties. Al-Rare Earth (RE)-based alloys form an important class of marginal glass-forming alloys in which the presence of Al nanocrystals accompanies primary crystallization. Our previous studies on Al-based rare earth (Al–RE) metal alloys (RE: Sm, Tb) have shown that the phase selection hierarchy upon devitrification depends on the middle range order present in the devitrification state. In this study, the atomic structures of binary Al-Sm metal alloys were investigated using molecular dynamics (MD) simulations with Embedded Atom Method (EAM) potential to reveal the structural evolution in molten, supercooled, and quenched states considering short and medium range orders.

Subject Keywords

Metallic glasses, Aluminum alloys, Molecular dynamics, Short-range order, Medium-range order

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https://hdl.handle.net/11511/98545

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

D. Sarıtürk, “Local structures of the Al-RE marginal metallic glasses and liquids: A molecular dynamics study,” M.S. - Master of Science, Middle East Technical University, 2022.