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1、ElectromagneticTestingEddyCurrent-BasicTheory&Equipment,MethodsandApplications1976’sRQA/M1-5330.12(VolumeI&II)GeorgeC.MarshallSFCMyASNTLevelIIIPre-ExamPreparatorySelfStudyNotes13thApril2015CharlieChong/FionZhangAerospaceApplicationsCharlieChong/FionZhang一本很古遠(yuǎn)的教材-1976很簡(jiǎn)易雖然一些方法已經(jīng)變浮云CharlieChong
2、/FionZhangYear-1976CharlieChong/FionZhangYear-1976CharlieChong/FionZhangCharlieChong/FionZhangFionZhangatShanghai13thApril2015http://meilishouxihu.blog.163.com/CharlieChong/FionZhangGreekletterCharlieChong/FionZhangIVONATTSCapable.CharlieChong/FionZhanghttp://www.naturalreaders.com/tnrreuCydd
3、ECharlieChong/FionZhangINTRODUCTIONThishandbookisoneofaseriesonnondestructivetesting,andisthesecondinasetoftwovolumespresentedonthesubjectofEddyCurrentTesting.Theidentificationandinspectionofbasemetalsandmetalalloyshasbecomeanincreasinglyimportantfactorintheproductionandfabricationofmetalprod
4、ucts.Specialalloys,differingonlyslightlyincompositionandnotatallinappearance,canbeidentified,andinspectedfordiscontinuitiesbytheeddycurrenttestmethod.Applicationsofsomeofthevariouseddycurrenttestingmethodsarepresentedinthisvolume.Somediscussionofthedifferentcoilsthatareusedandtheirphysicaland
5、electricaldesignshouldhelpthereadergetafeelfortheelectromagnetictestingsystems.Theindications,displaysandchartsthatareusedfortestingpurposesaswellassomeoftherequirementsforacceptableteststandardsarealsopresented.Theeddycurrenttestingprogrammedinstructionseries(twovolumes)willprovidesomeoftheb
6、ackgroundmaterialnecessarytotakeyouonestepclosertoyourgoalsintheareaofnondestructivetesting.ThetwovolumesshouldbereadinsequencebecausemuchofthematerialinVolumeIIisbasedonfactslearnedinVolumeI.Year:1967CharlieChong/FionZhangEddyCurrentAneddycurrentisdefinedasacirculatingelectricalcurrentinduce
7、dinanisolatedconductorbyanalternatingmagneticfield.Eddycurrenttestingisbasedonthefactthattheflowofeddycurrentsgeneratesamagneticfieldthatopposesthemagneticfielddevelopedbythetestcoil.Anindicatingdeviceconnectedtoatestcoilwillbeaffectedbytheco
