| Effect of elastic interaction energy on the spinodal decomposition and subsequent coarsening stage in Fe-20%Mo alloys is systematically investigated by microscopic phase field kinetic model of considering elastic interaction energy. The results show that modulated wavelength and critical time (the time between spinodal decomposition and coarsening stage) decrease with increasing elastic interaction energy. During coarsening stage, macrolattice and basket-weave structures are formed by regular distribution of atom enrichment phases. Average size cubic of atom enrichment phases is not in accord with single linear relation, which is broken gradually with the increase of elastic interaction energy. Therefore, coarsening mechanism is not the single Ostwald ripening but interplay of Ostwald ripening and coalesce growth mechanism. With increasing elastic interaction energy, the size and number of atom enrichment phases along [01] or [10] direction increase. The simulation results are in accord with transmission electron microscopy (TEM) image aged for 5h in Fe-20%Mo alloys. |
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