鋁鋰合金攪拌摩擦焊熱循環(huán)和接頭殘余應(yīng)力的研究.pdf

1、哈爾濱工業(yè)大學(xué)碩士學(xué)位論文鋁鋰合金攪拌摩擦焊熱循環(huán)和接頭殘余應(yīng)力的研究姓名：張偉申請學(xué)位級別：碩士專業(yè)：材料加工工程指導(dǎo)教師：馮吉才20050101!!查堡三些查蘭三耋罌圭耋堡絲蘭AbstraetTheeffectsofshapesandsizeparametersofweldingtoolsandtheweldingparametersontheweldingthermalcyclehistories，andtheeffectsofw

2、eldingparametersontheresidualstressofthefrictionstirwelded(FSW)jointsofAlLialloywereinvestigatedUsingseveralspotstemperaturemeasuringsystem，thethermalcyclehistoriesofdifferentpositionofworkpieceweremeasuredItapprovedthat

3、nomeltingphenomenonOccurduringA1一LialloyFSWprocessWeldingexperimentwasdoneusingdifferentshapesandsizeparametersweldingtools，ExperimentalresultsshowthattheshapeofweldingtoolhasasignificanteffectOnthepeaktemperatureofthewe

4、ldzone(wZ)ThemaximumpeaktemperatureoftheWZwasobtainedwhenthecone—threadpinwasselectedInaddition，theweldtoolsizes，includingtheshoulderdiameterandthepindiameter，alsohaveadramaticeffectonthepeaktemperatureoftheWZ，especially

5、theformerTheweldingparametershaveadifferent—extenteffectonthepeaktemperatureoftheWZTherankingisasfollow：therotationspeed，theweldingspeedandthetooltitleUsingresistancestraingauge，weldtransverseresidualstressonthedifferent

6、weldingparameters(suchasweldingspeedandrotatingspeedandtooltileangle)weregainedTheresidualstresstestingresultsindicatethattheweldingparametershaveasignificanteffectonthetransverseresidualstressdistributionsinthejointsThe

7、residualstressintheWZiSresidualcompressionstress，butintheheat—affectedzonefHAZ)itiSresidualtensionstressTheresidualcompressionstressis264MPa，obtainedatweldingspeedof160ram／rain，rotationspeedof800rpmandtooltitleof50，Theco