Microstructure Evolution in a Rapidly Solidified Cu85Fe15 Alloy Undercooled into the Metastable Miscibility Gap

(整期优先)网络出版时间:2005-05-15
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AmodelhasbeendevelopedtodescribethemicrostructureevolutionintheatomizeddropletsofCu-Fealloyduringcoolingthroughthemetastablemiscibilitygap.CalculationshavebeenperformedforCu85Fe15alloytoinvestigatetheprocessofliquid-liquidphasetransformation.Thenumericalresultsindicatethattheminorityphasedropletsarenucleatedinatemperatureregionaroundthepeakofthesupersaturation.TheaverageradiusoftheFe-richdropletsdecreasesandthenumberdensityoftheminorityphasedropletsincreaseswithdecreasingtheatomizeddropletsize.Thesimulatedresultswerecomparedwiththeexperimentalones.Thekineticprocessoftheliquid-liquidphasetransformationwasdiscussedindetail.