ThemicrostructureandmagnetostrictivepropertieswereinvestigatedintheTbdopedFe83Ga17-xTbx(x=0.05,0.10,0.20,0.30,0.40,0.50)bulkrodspreparedbymeltrapidlyquenching.ThepartialsolidsolubilityofTbintheFe–GamatrixwaspreliminarydetectedbythelatticeparametersandSEMobservation.ThematrixkeepsA2structureandthesecondphaseappearssurroundthegrainboundaryasxC0.1.h100ipreferredorientationisalsoobservedforx=0.1samplealongtheaxisofthequenchedrod.Thesaturationmagnetostrictionfirstincreasesandmaximumvaluereachesatx=0.1,andthendecreaseswithTbadditionincreasing.TheinitialincreaseofthemagnetostrictionshouldbeassociatedwiththepartialsolutionofTbinthematrix,themaximumvalueatx=0.1shouldbeattributedtotheh100ipreferredorientation,andthedecreaseofthemagnetostrictioniscorrelatedwiththeappearanceofthesecondphasealongthegrainboundary.
