Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10142227 | Journal of Alloys and Compounds | 2019 | 27 Pages |
Abstract
The microstructural evolution of Fe-6.5â¯wt.% Si alloy during rapid solidification was studied over a quenching rate of 4â¯Ãâ¯104â¯K/s to 8â¯Ãâ¯105â¯K/s. The solidification and solid-state diffusional transformation processes during rapid cooling were analyzed via thermodynamic and kinetic calculations. The Allen-Cahn theory was adapted to model the experimentally measured bcc_B2 antiphase domain sizes under different cooling rates. The model was calibrated based on the experimentally determined bcc_B2 antiphase domain sizes for different wheel speeds and the resulting cooling rates. Good correspondence of the theoretical and experimental data was obtained over the entire experimental range of cooling rates. Along with the asymptotic domain size value at the infinite cooling rates, the developed model represents a reliable extrapolation for the cooling rate > 106â¯K/s and allows one to optimize the quenching process.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Senlin Cui, Gaoyuan Ouyang, Tao Ma, Chad R. Macziewski, Valery I. Levitas, Lin Zhou, Matthew J. Kramer, Jun Cui,