Basedonexperimentalresults,thispaperpresentsthatunderspecificvibrationalandsolidifyingconditions,thereareseveralperiodiclayersappearinginthecrystallizationofA1-3%Mgalloy.Themechanismoftheformationofperiodiclayerisdiscussed.Furthermore,theuseofthelayerstoidentifythesolid-liquidinterfaceandtheeffectofsuchlayersonmechanicalpropertiesofalloyhavebeenstudied.