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Thermodynamically, the multi-principal-component compositions of high entropy alloys (HEAs) bring diversified phase transformation paths. In this study, we report that a γ″ phase precipitates from the face centered cubic (FCC) matrix and then abnormally transforms into a ε phase, instead of the δ phase as reported in superalloys. The ε phase has a (NiCo)3Nb-type hexagonal crystal structure. The phase...
The coarsening of polydisperse particles with different initial particle size distributions (PSD) is studied using a quantitative phase field model in two dimensions with emphasis on the transient behavior before reaching steady state. The coarsening rate constant, scaled PSD, scaled evolution law and radial distribution function were systematically examined and compared with available theoretical...
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