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Meeting

2026 TMS Annual Meeting & Exhibition

Symposium

Computational Thermodynamics and Kinetics

Presentation Title

Phase-Field Simulations of Nucleation, Growth, and Coarsening of β1 Precipitates in Mg-Nd Alloys

Author(s)

Lingxia Shi, Stephen DeWitt, Zhihua Huang, Qianying Shi, Amit Misra, John Allison, David Montiel, Katsuyo Thornton

On-Site Speaker (Planned)

Lingxia Shi

Abstract Scope

The spatial distribution and morphology of precipitates largely determine the precipitation hardening response of various Mg-RE alloys. In this work, an integrated experimental/phase-field (PF) workflow is developed to simulate the nucleation, growth and coarsening of β1 precipitates in Mg-Nd alloys during aging. The PF model, which includes a stochastic approach to introduce nuclei, is parameterized with available literature data and experimental measurements, including matrix composition and number density at different aging times. The workflow includes extraction of three-dimensional (3D) information from two-dimensional (2D) cross-sectional experimental microstructures, as well as conversion of 3D microstructural information to 2D PF inputs, via stereology. We explore the viability of 2D PF simulations as a reduced model for 3D PF simulations in situations where 3D simulations are especially challenging, as in this Mg-Nd system where precipitates are highly anisotropic. A validated model would allow for optimization of aging conditions to achieve desired microstructures.

Proceedings Inclusion?

Planned:

Keywords

Modeling and Simulation, Phase Transformations,

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