铸造镁合金中微孔对其组织和力学性能的影响

(),,,;,;Ar,Ar,21%,50%;;;TG14612+2A1001-2249(2007)01-0011-03:2006-10-10:,,1974,,,(430074),:027-87556262,13697336786,E-mail:xsxhust2001@yahoo1com1cn,Mikucki[1],,,,,[24],,,,,,1AZ91D,11AZ91D%wBAlZnMnBeSiCuFeNiMg910301640133010014010310100490100110100035kW,10kg(Ar+HFC2134a)RJ22Ar(991999%),730NiCr2NiSi[5],Sievert,,3,7001,,11,,MeF3[6],12mmSolidVF3102211()2,100g1319cm32,14mm38mm,14mm,(2a);22mm(2b),,30mm(2c),,38mm(2d),,,,2,,110%910%,2112007271©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(a)=14mm(b)=22mm(c)=30mm(d)=38mm2,100g1319cm32(100g1319cm3)/mm14223038/%110216513910,[7],60%,,,,AZ91D(470595),,,,,,,,,Mg17Al12,,[8],(14mm),2a,,Mg,,,,,,(22mm),2b,,,AZ91D,,,,,,(30mm),2c,,,,38mm,2d,,,,,,212,33,100g1319cm31013cm3,,3,,,,,(3a3b)(a)=14mm(b)=22mm(c)=30mm(d)=38mm3,100g1013cm3212007271©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(100g1013cm3)/mm14223038/%017118411515213,Ar,100g1319cm3710cm3(4),3,,430mm,,24,,14mm70%,30mm38mm55%,,Ar4Ar(100g710cm3)/mm14223038/%013016214319(a)=14mm(b)=22mm(c)=30mm(d)=38mm4Ar,100g710cm32145+Ar(),+Ar,,Ar,,21%,50%,,,+Ar,,,5/MPa/%1501321817216316+Ar181124123(1),;,(2)Ar,30mm,,(3)+ArAZ91D,,+Ar,21%,50%[1]MIKUCKIBA,SHEAROUSEJD1InterdependenceofhydrogenandmicroporosityinmagnesiummagnesiumalloyAZ91[J]1SAE,Interna2tionalCongressandExposition,1993(3):125.[2]YUANGY,LIUMP,DINGWJ,etal1Microstructureandmechani2calpropertiesofMg2Zn2Si2basedalloys[J]1MaterialsScience&Engi2neeringA,2003,357(12):3142320.[3]DUWW,SUNYS,MINXG,etal1MicrostructureandmechanicalpropertiesofMg2Albasedalloywithcalciumandrareearthadditions[J]1MaterialsScience&EngineeringA,2003,356(1-2):127.[4]YUANGY,SUNYS,DINGWJ1EffectsofbismuthandantimonyadditionsonthemicrostructureandmechanicalpropertiesofAZ91mag2nesiumalloy[J]1MaterialsScience&EngineeringA,2001,308(1-2):38244.[5]XUSX,WUSS,MAOYW,etal1Variationofhydrogenlevelinmagnesiumalloymelt[J]1ChinaFoundry,2006,3(4)2752278.[6]LEOPRAKASHDG,PRASANNAB,REGENERD1ComputationalmicrostructureanalyzingtechniqueforquantitativecharacterizationofshrinkageandgasporesinpressurediecastAZ91Magnesiumalloy[J].ComputationalMaterialsScience,2005(32):4802488.[7]ZHAOH,DEBROYT1PoreformationduringLaserbeamweldingofdie2castmagnesiumalloyAM60B-Mechanismandremedy[J]1Weld2ingResearch,2001(8):2042210.[8]SHEAROUSEJD,MIKUCKIBA1Theoriginofmicroporosityinmag2nesiumalloyAZ91[J]1JournalofMaterials&Manufacturing,1994,103:5422552.(:)312007271©1994-2007ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(Series:No.166)CONTENTS&ABSTRACTSFabricationofMagnesium/aluminumLaminatedCompositesbyDiffusionBondingandItsInterfacePropertiesTanChengwen1,2,LiShanshan1,ZhouZhongqiang1,ZhengXiuhua1,WangFuchi1,CaiHongnian1,2(1.BeijingUniversityofScienceandTech2nology,Beijing,China;2.BeijingUniversityofAeronau2ticsandAstronautics,Beijing,China)2007,27(1)001003AbstractMagnesium/aluminumlaminatedcompositeswerefabricatedbydiffusionbondingmethod,andinterfacialcharacteristicsweremeasuredbynano2indentationtoknowhowtoimprovetheinterfacialpropertiesofheattreatedcomposites.Theresultsrevealthatlaminatedcompositeswithdesirablebondingcanbepreparedbythediffusionbondingwiththreesetsofprocessingparameters,including400/30MPa/10min,400/40MPa/10min,400/30MPa/20min,however,thediffusionlayerisnotvisibleinthecondiionsof400/30MPa/10min.Diffu2sionlayerthicknessofthecompositescanberemarkablyincreasedwithheattreatment,andnano2hardnessofdiffu2sionzoneis3timeshigherthanthatofthematrix,andtheYoung’smodulusislocatedintherangeofthatofmagnesi2umalloyandaluminumalloy.KeyWords:Magnesium/aluminumLaminatedCom2posites,Interface,Nano2indentation,DiffusionBond2ingAModelfortheTensileDuctilityofAluminumAlloywithVarious2sizedMicro2cracksSongMin,ChenKanghua,QiXiongwei(CentralSouthUniversity,Chan2gsha,China)2007,27(1)003006AbstractAnonlinearmodelwasdevelopedtodescribetherelationshipbetweentensileductilityandconstituentsinmicronscaleaswellasdispersoidsinsub2micronscaleinaluminumalloybasedontheformationofvarious2sizedmi2cro2cracksduringdeformation.Themodelpredictiona2greeswellwiththeexperimentaldata.Effectsofthevol2umefractionandsizeofthevarious2sizedconstituentsanddispersoidsontensileductilityofaluminumalloycanbequantitativelyanalyzedbymeansofthemodel.Mean2while,measuresofimprovingtensileductilityofaluminumalloyweretakenbasedonthesimulatedresults.KeyWords:AluminumAlloy,TensileDuctility,Mod2el,DeformationandCrackEffectsofAgMicro2alloyingonHeat2resistantProper2tiesofAl2Cu2Mg2Mn2(Zr,Ti)AlloyXiaoDaihong1,2,SongMin1,ChenKanghua1,WangJiannong2(1.Cen2tralSouthUniversity,Changsha,China;2.ShanghaiJiao2tongUniversity,Shanghai,Jiaotong)2007,27(1)007010AbstractTheeffectsofminorAgadditionontheheat2re2sistantpropertiesofAl25.3Cu20.8Mg20.5Mn20.5(Zr+Ti)alloyhavebeeninvestigatedbytensiletestingandtransmis2sionelectromicroscope(TEM).Itisrevealedthattheambi2entstrengthandheat2