摩擦焊接头残余应力及组织对超声频谱的影响

(,710072)15MHz45,INFLUENCEOFRESIDUALSTRESSANDMICROSCOPICSTRUCTUREOFFRICTIONWELDEDJOINTSONULTRASONICSPECTRUMYangSiqianLiuYanhuaLiJinglong(NorthwesternPolytechnicalUniversity,Xipan)AbstractFrictionweldedjointsofmediumcarbonsteel(45steel)weretestedbyultrasonicimmersionmethod(f=15MHz).Theregularityoftheinfluenceofmicroscopicstructureandresidualstressofweldmetalzoneandheat2affectedzoneonultrasonicspectrumwasfoundbyfrequencyanalysisofultrasonicwaveformsbeforeandafterstressrelieving.KeywordsFrictionweldedjointResidualstressMicroscopicstructureUltrasonictestingSpectrumanalysis,,,,15MHz,45,,,,1138mm,12mm,,27mm(26mm),,,11.2.3,14.4,11.5,13.6,12.7.8.9.10.15.16.17.18.19.20.21.22.30222520005NDTVol.22No.5May2000©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,,,100MHz,,,,3012,,,2,Matlab,,2,3,,,30022h,,34524,z,z=04ag,4P123MHz,z,P1z=4mm,P14MHz4gP1,6dB(40mV)5,,P1fP17.5MHz,402:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.580mV,P2fP228MHz,P2z=4mm,fP210MHz,,P140mV,(410MHz)5,,fP24(6),fP2,P24P16fP7ad,,,,3mm+,,,0.5mm+,,5,10MHz,(10MHz),,,10MHz3(1)410MHz,10MHz(2)1,..:,1996.2HunikeUD.Ultrasonicspectralmethodsforstructures(221)502:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.6,,(2),2mm,();2mm,(3),,,v,,v=DõFNvDNF,150mmös,15%;1525mömin()(4),,,,:1999207223(205)(a)200(c)200(b)200(d)2007analysis.Procofthe10thWorldConferenceonNondestructiveTesting(Vol.7),Halifax:1A249:1999208209122:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.