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About this Abstract
Meeting 2027 TMS Annual Meeting & Exhibition
Symposium Computational Thermodynamics and Kinetics
Presentation Title Solute-Driven Phase Transformations and Mushy-Zone Evolution in Gradient-Prepared Al–Cu Alloys
Author(s) Irina Nizovtseva, Yindong Fang, Stephanie Lippmann
On-Site Speaker (Planned) Irina Nizovtseva
Abstract Scope Motivated by false-bottom formation beneath summer sea ice, this work examines solute-driven phase transformations in gradient-prepared Al–Cu alloys as a controllable binary benchmark. Samples with a macroscopic concentration gradient are exposed to nominally isothermal conditions so that phase evolution is driven primarily by solute redistribution rather than by external cooling. The study focuses on two regimes: a partially molten state, where a mushy region persists and microstructure evolves locally, and a fully liquid state, which provides a reference for concentration relaxation. Concentration profiles, phase fractions, and arrested microstructures are analyzed together with a one-dimensional moving-boundary model and a coarse-grained phase-field description. The results establish an experimentally accessible route for studying mushy-zone evolution, interface motion, and phase transformation kinetics in a system relevant to broader solidification problems involving coupled transport and moving phase boundaries.
Proceedings Inclusion? Planned:
Keywords Solidification, Modeling and Simulation, Phase Transformations

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