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1.
1 INTRODUCTIONItisnowacceptedthatbothalloysbasedonFe3AlandonFeAlshowapeakintheirflowstressattesttemperaturesoftheorderof500~600℃[1-6].EarlystudiesontheFeAlalloysfailedtoshowsuchintermediatetemperaturepeaks,whichcannowbeexplainedthroughthelowtemperatu…  相似文献   

2.
ABSTRACTSFROMTRANSNFsoc(Chineseedition)Vol.3,No.4,Oct.1993A003—CalculationforRandom-FuzzyReliabilityofRockSlopewithPossessing...  相似文献   

3.
Shot peening and solid lubricating on Ti6Al4V fretting fatigue   总被引:3,自引:0,他引:3  
1IntroductionTialloyisakindofimportantmaterialforjetengine,andsomeofthemareappliedunderfrettingfatigue(FF).ShotpeeningandsurfacecoatingshavebeensuggestedtoimprovetheendurancelivesofFFsince1970′s[1].Amongallofprocessing,shotpeeningholdsitspriority.…  相似文献   

4.
nterfaceFormationofSeveralHeterojunctionsConcerningⅣandⅡⅥSemiconductors①BanDayan,XueJiangeng,FangRongchuanDepartmentofPhysic...  相似文献   

5.
CathodicProcessofTi(Ⅳ)inMoltenLiF-NaFShiQingrongandDuanShuzhen石青荣,段淑贞(UniversityofScienceandTechnologyBeijing,Beijing100083,C...  相似文献   

6.
1IntroductionMoreandmorecarbonatemeltshavebeenemployedtoserveaselectrolyterecently,especiallyinmoltencarbonatefuelcells(MCFC).MCFCisbelievedtobeoneofthemostpromisingnewenergyconversiondevicethatconvertschemicalenergyinfossilfuelsintoelectricity[1~3].MCFCt…  相似文献   

7.
1.IntroductionFunctionallyGradientMaterial(FGM)isakindofnewthermalbarriercoatingwhichappearedintheearly1990s〔1,2〕.TheproductionofFGMischieflycarriedoutbymeansofhightemperature.AfewstudiesonthepreparationofFGMbylowtemperaturearemade〔3,4,5〕.Electroless…  相似文献   

8.
1.IntroductionBoronisaveryeffectiveliquidphasesinteringadditivetoiron〔1-2〕.TheFeBCphasediagramshowsaternaryeutecticreactionoccurringat1097℃〔3〕.AdditionofFeBandFeCmasteralloypowderstoFeMoBCsinteredsteelscanactivatethesinteringprocessbyliquidpha…  相似文献   

9.
Porosity of aluminum alloy in lost foam casting process   总被引:7,自引:0,他引:7  
1 INTRODUCTIONThelostfoamcasting (LFC) processiscalledasthe 2 1stcenturytechnology .Itsformingisdifferentfromthatoftheconventionalempty cavitycastingmethod[1,2 ].ForaluminumalloyinLFC process,pouringtemperatureofaluminummeltismuchhigherthanthatoftheempty cavity…  相似文献   

10.
1 INTRODUCTIONFatigueinvolvesthemicrostructuraldamageandfailureofmaterialsunderalternatingloads.Structuralmaterials,however,arerarelydesignedforfatigueresistance.Metallicalloysaregenerallydesignedforstrength,intermetallicsforductility,andceramicsfor…  相似文献   

11.
FactorsofeffectingcreepruptureofSMTsolderjointsZhuYing;FangHongyuan;andQianYiyu(HarbinInstituteofTechnology)CuiDianheng(Fourt...  相似文献   

12.
0 IntroductionFuzzylogiccontrol(FLC)isaknowledgebasedcontrolstrategythathasshownitspromisingapplicationinindustrialcontrolengineeringinrecentyears.Itcanbeusedwhenasufficientlyaccuratemodelofthephysicalsystemtobecontrolledisunavailableorwhenaprecisemeas…  相似文献   

13.
1 INTRODUCTIONOnewaytoselectcandidatealloysofpossibleinterestforhightemperatureapplicationsistorequireacombinationofhighmeltingtemperatureandlowdensity,asreportedbyFleischer[1].Heshowedthat,ingeneral,L12alloysareprobablynotverygoodcandidates,since…  相似文献   

14.
1INTRODUCTION“Oncesaw,neverforgoten”isasentencewhichusedtodescribeahumansenseandlearningsequence.Forexample,aboyglancedatalo...  相似文献   

15.
1.IntroductionAccordingtomanypreviousstudies,thestabilityoff.c.candh.c.pstructuresinFeMnorFeMnbasealloysdependssensitivelyoneithertheMncontentorthemagneticpropertiesofthef.c.cparentphase〔14〕.InFeMnalloyscontaining17~28at.%Mn,theγ→εtransformations…  相似文献   

16.
1 INTRODUCTIONIngeneral,FeS2istakenascathodematerialtoformmoltensaltbatterywithmostadvancedanodematerialsLiBalloys[1].Evidently,thestateofFeS2hascorrespondingeffectsonthedischargecharacteristicsofLiB/FeS2moltensaltbatteries.Investigationonthispr…  相似文献   

17.
1.IntroductionTheconceptoffunctionallygradientmaterials(FGM)wasintroducedin1984,whichwasrelatedtothedevelopmentofheatshieldingstructurematerialsforfuturespaceplaneprogramme,withthecompositionaldistributionofanFGMchanginggraduallyfromonesurfacetoth…  相似文献   

18.
MicrostructureandApplicationofYBCOSuperconductiveFilmswithLowSurfaceResistanceWangXiaoping,YangBingchuan,ShiDongqi,PengZheng...  相似文献   

19.
1.PrefaceForFeMnSialloyfamily,γ→εmatensitictransformationissemithermoplastic,andstructureoftheparentphaseisdisordered.ThemechanismofshapememoryofthiskindofalloyisdifferentfromthatofNiTiandCubasealloy.theshapememoryeffectoftheFeMnSialloyfamilyor…  相似文献   

20.
1.IntroductionIthasbeenreportedthatFeMnSiCrNishapememoryalloysexhibitnotonlyagoodshapememoryeffect(SME),butalsoagoodcorrosionresistance〔1,2〕,comparedwithFeMnSialloys.Furthermore,itcanbeusedinmanufacturingpipecouplingsbecauseofitshighphasetransf…  相似文献   

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