A High-Resolution Population Dynamic Model for Predicting Homogeneous Precipitation Kinetics of Spherical Precipitates During Thermal Aging

A high-resolution population dynamic model has been developed to describe the microstructure evolution in homogeneous precipitation of spherical precipitates during thermal aging. By solving the continuity equation with a high-resolution scheme based on the flux-limiter methods for hyperbolic conser...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2021-11, Vol.52 (11), p.4987-4996
Main Authors: Wang, Qing-Liang, Xiong, Hao
Format: Article
Language:English
Subjects:
Aging
Aging (metallurgy)
Characterization and Evaluation of Materials
Chemical precipitation
Chemistry and Materials Science
Conservation laws
Continuity equation
Dynamic models
High resolution
Interfacial energy
Materials Science
Metallic Materials
Model accuracy
Nanotechnology
Nucleation
Original Research Article
Precipitates
Structural Materials
Surfaces and Interfaces
Thin Films
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Summary:A high-resolution population dynamic model has been developed to describe the microstructure evolution in homogeneous precipitation of spherical precipitates during thermal aging. By solving the continuity equation with a high-resolution scheme based on the flux-limiter methods for hyperbolic conservation laws, this model has second-order accuracy in smooth regions and gives well-resolved, nonoscillatory discontinuities formed during the nucleation stage. The predictions of the model are in very good agreement with the reported experimental data for Al–Sc alloys, especially at early aging time. Through fitting the experimental data, a value of 180 ± 5 mJ m - 2 is obtained for the Al / Al 3 Sc interfacial energy, which is reliable on condition that the aging time is not very long.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-021-06443-x