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1、内蒙古科技大学硕士学位论文AbstractComparewithrareearthTerfeol-Dmagnetostrictivematerials,Fe-Ga-Alalloyasanewtypeofmagnetostrictivematerialhassomecharacteristicssuchaslowsaturationfield,highpermeability,smallbrittle,hightensilestrengthandsoon.Ithasbroadapplicationprospects.Thispaperstudiedcast,rolledstate,thecr
2、ystalstructureafterheattreatment,magnetostrictionofFe80-xMnxGa15Al5（x=0，0.5，1，2，4，6)seriesalloys,andmeasuredroomtemperaturemagneticloopsandVickers-hardness.Theresultsshows:CastalloyisthestructureofdisorderedbccandthegrainofalloyisCoarse.LargestMagnetostrictioncoefficientofcastalloyFe80-xMnxGa15Al5
3、（x=0，0.5，1，2，4，6)isFe76Mn4Ga15Al5,to106×10-6.Thealloywithheattreatmentisthestructureofdisorderedbccandthegrainofalloyiscoarsetoo.Themajororientationsoftheannealedalloyare{112}110,{111}110ofaorientationand{111}011,{111}112ofγorientation.Thelargestmagnetostriction
coefficientofFe76Mn4Ga15Al5alloyis5
4、9×10-6；Themajororientationsoftheannealedalloyare{112}110and{111}110ofαorientation.ThelargestmagnetostrictioncoefficientofFe76Mn4Ga15Al5alloyis96×10-6,largerthanannealedalloy.TheeffectofMnelementonalloymagnetostrictioncoefficientisobvious.ThemagnetostrictioncoefficientofalloyimprovedwithMncontentin
5、creasedandthemaximumincreaseappearedwhenMnatomicratiowas4.ComparedwiththealloywithoutMn,themagnetostrictioncoefficientofcastalloyis82ppm,improved32%.Themagnetostrictioncoefficientoftherolledalloyis106ppm,increased4.8-fold.Themagnetostrictioncoefficientofthequenchedalloyis96ppm,improved11.6%.Themag
6、netostrictioncoefficientoftheannealedalloyis59ppm,increased1.2-fold.Alloymagneticlooplinearityisbetter,andalmosthasnoremanenceandcoercivity.Itisbenefittorepeatedmagnetizationofmaterials.TheVickers-hardnessofalloyincreasedwiththeincreaseofMncontent.KeyWords：Fe-Ga-Alalloys;texture;magnetostrictionII
7、内蒙古科技大学硕士学位论文目录摘要..............................................................................................................................IAbstract............................................................
