焊接方法对Ti6Al4V合金接头微观组织及拉伸和冲击性能的影响

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1、黉槊万方数据ELSEⅥERPreSSAva¨abIeOnIIneat、^n^^^，．sciencedlrect．cOm．一，，-·二一ScienceDirectTrans．NonferrousMet．Soc．China21(2011)1253一1262T1．ansactions0fNonferrousMetalsSocie够ofChina■■■●■●■●■■■■●■■■■■■■■■■■■■■■1www．tnmsc．cnInnuenceofweldingprocessesonmicrostructure，tensileandimpactpropertiesofTi一6Al一4Va110

2、yjointsT．S．BALASUBRAMANIANl，M．BALAKRISHNAN2，V．BALASUBRAMANIAN2，M．A．MUTHUMANICKAMl1．CombatVehicleResearchandDevelopmentEstablishment(CVRDE)，AVadi，Chennai·600054，India；2．CenterforMate“alsJoiningResearch(CEMAJOR)，Depar仃nentofManufacnH’ingEngineering，AnnamalaiUniversity，Annamalainagar608002，T锄ilNad

3、u，IndiaReceived19June2010；accepted6Septenlber2010Abstract：Titaniumalloyshavebeensuccess如lly印pliedforaerospace，shipandchemicalindustriesbecausetheypossessmaIlygoodcharacteristicssuchashi曲spec讯cstrength，superiorcorrosionresistanceandexcellenthi曲temperatureresistance．Thougllmesea110ysshowreasonabl

4、eweldabilitycharacteristics，thejointpropeniesaregreatlyinnuencedbytheweldingprocesses．Weldthemalcvcleoftheprocesseswillcontmlmeweldmetalsolidificationandsubsequentphasetransfomationandresultantmicrostmcture．TheweldedjointsofTi一6A1-4Va110ywerefabricatedbygastullgstenarcwelding(GTAw)，laserbeamwel

5、ding(LBW)andelectmnbe锄welding(EBW)processes．ThejointsfabricatedbyEBWprocessexhibithighers仃engthcomparedwiththeGTAWandLBWjoints；butthejointsbyGTAwpmcessexhibithi曲erimpacttou曲nesscomparedwiththeLBWandEBW{oints．Theresultamtensileandimpactpropertiesofmeweldedjointswerecorrelatedwiththeweldmetalmicr

6、ostmctures．Kevwords：titaniumalloV：gastungstenarcwelding；laserbeamweldmg；electronbeamweldmg1IntroductionTitaniumanoyshavebeensuccessfullyappliedforaerospace，ship，desalinationofseawater，biomechanicsandchemicalindustriesbecausetheypossessmanygoodcharacteristicssuchashi曲specmcstren酉h，corrosionresis

7、tance，andtoughness，10wthemalexpansionrate，hightemperaturecreepresistance[1]．Presently，Ti．6A1．4Visoneofthemostwidelyusedtitaniuma110ys，accountingformorethanhalfofalltitaniumtonnageintheworld．andnoothertitaniumallovsmreatenitsdomina