Abstract
The separation of Cr-enriched α′ phase in Fe-(25–45) at.% Cr alloys is studied from the metastable region to the unstable region. The three-dimensional phase-field simulation shows a similar morphology with the transmission electron microscopy micrographs, and the quantitative simulation of particle size and particle number density have a good accordance with the present and the referred experimental results, with the microhardness of the alloy increasing simultaneously with the simulated volume fraction of the α′ phase. The mechanisms of phase separation were clarified by the interface composition evolution of the α/α′ phase, and a transitional characteristic from nucleation and growth to spinodal decomposition is shown in the 30 at.% Cr alloy aged at 750 K. The combination of quantitative simulation and experimental results demonstrates the ability of the phase-field model to perform high-throughput simulations for kinetics evolution in the alloys with phase separation.
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This work was supported by the National Natural Science Foundation of China (Grant No. 51571122) and the Fundamental Research Funds for the Central Universities (Grant No. 30916015107).
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Li, Y., Shi, S., Zhu, L. et al. Continuum Separation of Nanoscale Phase in Thermal Aging Fe-Cr Alloys: Phase-Field Simulation and Experiment. JOM 71, 1803–1812 (2019). https://doi.org/10.1007/s11837-019-03399-7
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DOI: https://doi.org/10.1007/s11837-019-03399-7