Mg segregation at Al/Al3Sc heterophase interfaces on an atomic scale: experiments and computations.
Microscopic factors governing solute partitioning in ternary two-phase Al-Sc-Mg alloys are investigated combining three-dimensional-atom-probe (3DAP) microscopy measurements with first-principles computations. 3DAP is employed to measure composition profiles with subnanometer-scale resolution, leading to the identification of a large enhancement of Mg solute at the coherent alpha-Al/Al(3)Sc (fcc/L1(2)) heterophase interface. First-principles calculations establish an equilibrium driving force for this interfacial segregation reflecting the nature of the interatomic interactions.
Marquis
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Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, USA.
Seidman
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Asta
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Woodward
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C
Ozoliņs
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