|
|
金属学报(英文版) 1998
CELLULAR SPACING SELECTION OF Al-0.53wt%Zn ALLOY UNDER NEAR-RAPID DIRECTIONAL SOLIDIFICATION CONDITIONKeywords: Al-Zn alloy,near-rapid directional solidification,cellular spacing,history-dependence Abstract: 1.IntroductionCellular/dendriticspacing,asoneofthemostimportantsolidificationmicrostructuralscales,isofcriticalsignificancetothestudyofsolidificationtheoryandcontrolofmicrostructures.Recently,severalimportantdevelopments1--4]havebeenmadeintheoreticalresearchesonplanarfrontgrowthandtheselectionofcellular/dendriticstructureatlowgrowthvelocityunderconstrainedcrystalgrowthcondition,andithasbeenrecognizedinexperimentalinvestigationsls--ic]thatthereexistsawideallowablerangeofprimarydendriticspacing…
|
