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1、MeasurementofheattreatmentinducedresidualstressesbyusingESPIcombinedwithhole-drillingmethodAbstract:lnthisstudy,residualstressesinheattreatedspecimenweremeasuredbyusingESPI(ElectronicSpeckle-PatternInterferometry)combinedwiththehole-drillingmethod．Thespecimen，ma

2、deofSUS304austeniticstainlesssteel,wasquenchedandwatercooledtoroomtemperature．NumericalsimulationusingahybridFDM／FEMpackagewasalsocarriedouttosimulatetheheattreatmentprocess．Asaresult，thethermalstressfieldswereobtainedfromboththeexperimentandthenumericalsimulati

3、on．Bycomparisonofstressfields,resultsfromtheexperimentalmethodandnumericalsimulationwellagreedtoeachother,therefore，itisprovedthatthepresentedexperimentalmethodisapplicableandreliableforheattreatmentInducedresidualstressmeasurement．Keywords:thermalstress;heattre

4、atment;residualstress;electronspeckle-patterninterferometry;hole-drillingmethod;hybridFDM/FEMResidualstresseswhichappearduringdifferentstagesofthemanufacturingprocessofstructuralelementsmayexertaconsiderablynegativeinfluenceonboththestructure’sstaticstrengthandf

5、atiguelifetime[1].Ontheotherhand．Forsometypesofstructuralunits,takingintoaccountresidualstressmayrevealnewbeneficialoperatingcapabilities．Therefore,itisnecessaryandimportanttodeterminetheresidualstressesinrealstructures．Todeterminetheresidualstresses，manystressm

6、easurementmethodshavebeendeveloped．Someofthosemethodsaredestructiveandsomenondestructive．Thedestructivemethodsrelyonthemonitoringofchangesincomponentdistortion,eitherduringthegenerationoftheresidualstressesorafterward,bydeliberatelyremovingmaterialtoallowthestre

7、ssestorelax，whilenondestructivemethodssuchasXRD(X—RayDiffraction)mostlyusediffraction．Ingeneral,nondestructivemethodscangivethehigheraccuracythandestructive.Butitisalsoaveryhigh-costsolution．Inmostofengineeringfield，destructivemethodslikehole-drillingstraingauge

8、methodorotherscangiveenoughaccuracywithmuchlowercost.Amongthosedestructivemethodsforresidualstressmeasurement,theso-calledhole-drillingmethodiswidelyused．Inthismethod