| Autor: |
Mazhukin, V. I., Shapranov, A. V., Koroleva, O. N., Mazhukin, A. V. |
| Zdroj: |
Mathematical Models & Computer Simulations; Apr2024, Vol. 16 Issue 2, p223-234, 12p |
| Abstrakt: |
Within the kinetic-atomistic approach, a new approach is proposed for constructing the temperature dependence of the stationary velocity of propagation of the solid–liquid interface (SLI) in metals: aluminum, copper, and iron with different crystallographic orientations. The considered temperature range includes the range of maximum allowable overheating/overcooling values for each of the metals. A significant modification to the well-known kinetic model with the Wilson–Frenkel (WF) diffusion constraint, which is used to construct the response function, is made. An atomistic simulation of the processes of melting/crystallization of metals aluminum, copper, and iron is carried out over the entire temperature range using three interaction potentials of the "embedded atom" family. By comparing the simulation results with the data of the modified kinetic model, the response function of the interface velocity in the range of maximum allowable overheating/overcooling values in metals is constructed using the least squares criterion. The use of the modified WF kinetic model in calculations significantly improves the accuracy of the response function over the considered temperature range. The resulting temperature dependence of the interface velocity is diffusion-limited and is described by the same equation for each metal over the considered temperature range. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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