空心微珠复合材料电火花切割工艺参数

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1、Trans.NonferrousMet.Soc.China27(2017)998−1010OptimizationofelectricaldischargemachiningprocessparametersforAl6061/cenospherecompositeusinggrey-basedhybridapproach121A.DEY,S.DEBNATH,K.M.PANDEY1.DepartmentofMechanicalEngineering,NationalInstituteofTechnologySilchar,Assam788010,India;2.Departmentof

2、ProductionEngineering,NationalInstituteofTechnologyAgartala,Tripura799055,IndiaReceived11April2016;accepted21September2016Abstract:Flyashhascongregatedconsiderableattentionasapotentialreinforcementforaluminummatrixcomposites(AMCs)toenhanceselectivepropertiesandreducethecostoffabrication.However,

3、poormachinabilityofsuchAMCslimitstheirapplication.ThepresentstudyfocusesonthepreparationofcenosphereflyashreinforcedAl6061alloysbycompocastingmethod.X-raydiffractionanalysisofthepreparedAMCsexposesthepresenceofcenosphereparticleswithoutanyformationofotherintermetalliccompounds.Inthisstudy,electr

4、icaldischargemachining(EDM)wasengagedtoexaminethemachinabilityofthepreparedmetalmatrixcomposite(MMCs).ThemeasuredperformancecharacteristicsforthevariouscombinationsofinputprocessparameterswereconsideredtobeMRR,EWRandSR.Facecenteredcentralcompositedesign(CCD)ofresponsesurfacemethod(RSM)wasemploye

5、dtodesignthenumberofexperimentaltrialsrequiredandahybridapproachofgrey-basedresponsesurfacemethodology(GRSM)wasimposedforpredictingtheoptimalcombinationofprocessingparameterinEDMprocess.Generousimprovementwasobservedintheperformancecharacteristicsobtainedbyemployingboththeoptimalsettingofmachini

6、ngparameters.Theoptical3DsurfaceprofilegraphsoftheEDmachinedsurfacealsorevealedtheimprovementinsurfacequalityandtextureemployingtheoptimalprocessingconditionsproposedbyhybridGRSMapproach.Keywords:compocasting;electricaldischargemachining;responsesurfacemethod;grey-basedresponsesurfacemethodology

7、;analysisofvariance;desirabilityanalysistechniques(conventionalandspecificpatentedmethods)1IntroductionhavebeenattemptedtofabricateAl-basedMMCsreinforcedwithdifferentkindsofceramicparticles,Theadvancesinthefieldofmaterialsci