Using the orthogonal array with grey relational analysis to optimize the laser hybrid welding of a 6

Usingtheorthogonalarraywithgreyrelationalanalysis987

4CONCLUSIONS

ANd:YAGlaser–gasmetalarchybridwelding

experimentwasperformedwiththeexperimental

directionsdictatedbyanL18orthogonalarrayas

suggestedbyTaguchi.Theultimatetensilestrength

wasmeasuredinordertoevaluatetheweldability.

Agreyrelationalanalysisapproachwasadoptedto

optimizethehybridweldingperformancecharacter-

isticsintoasingleperformancecharacteristic,called

thegreyrelationalgrade.Thistechniquesimplifies

theoptimizationofcomplicatedperformancechar-

acteristics.Theanalyticalresultofthegreyrelational

analysisshowsanexcellentagreementwiththe

TaguchiDOEapproachandthemostsignificant

hybridweldingparametersarethelaserfocus,the

weldingwirefeedrate,andtheweldingwiretype.

Theexperimentalresultfortheoptimumsetting

givesmuchbetterweldingconditionsthanthe

preliminarysetting.

ACKNOWLEDGEMENT

Thisworkwassupportedbygrant10024116-2007-13

fromtheKoreaInstituteofIndustrialTechnology

EvaluationandPlanning(ITEP).

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