简介:“韩国设计展”是由韩国产业资源部主办,韩国设计振兴院(KIDP)承办的。通过展览,观众可以一览韩国设计行业的现在与未来.
简介:三维的磨擦促使焊接(FSW)过程模型基于液体力学被开发了。在焊接过程的材料运输被认为是laminar,粘滞、非牛顿经过一根旋转大头针流动的液体。划分焊接地区的一个标准根据速度地和粘性地的合作被给了。也就是说,在工具大头针附近存在的0-easy-flow地区对应于焊接金块地区;在0-easy-flow地区和1粘性乐队之间的区域被通信到热机械的影响地区(TMAZ)。模型给一些有用信息通过速度分发的模拟结果在FSW改进材料流动的理解。为了估价磨擦,促使大头针设计,三种大头针几何学,一个人是列大头针,第二是逐渐变细大头针,和最后大头针是螺丝钉线程逐渐变细大头针,在模型被使用。大头针几何学严重在0-easy-flow地区影响了速度分发的模拟结果。在0-easy-flow地区的速度分发能被看作优化磨擦的标准搅动工具设计。这研究将受益指导磨擦搅动工具设计。
简介:Afiniteelementbasedsensitivityanalysismethodforpreformdieshapedesigninmetalforgingisdeveloped.Theoptimizationgoalistoobtainmoreuniformdeformationwithinthefinalforgingbycontrollingthedeformationuniformity.Theobjectivefunctionexpressedbytheeffectivestrainisconstructed.Thesensitivityequationsoftheobjectivefunction,elementalvolume,elementaleffectivestrainrateandtheelementalstrainratewithrespecttothedesignvariablesareconstituted.ThepreformdieshapesofanH-shapedforgingprocessinaxisymmetricdeformationaredesignedusingthismethod.
简介:Anewconceptfordevelopmentofmetallicbiomaterialsisproposedinthisarticle,i.e.,acertainbio-functioncanberealizedforametalimplantthroughcontinuousreleaseofadesignedbio-functionalmetalelementfromsurfaceofthemetalimplantinthebodyenvironment.ThiscreativeideahasbeenverifiedtobepossiblebyseveraldifferentinvitroandinvivoexperimentalevidencesontheCu-bearingstainlesssteelsandmagnesiumbasedmetals.ItwasindicatedthatatraceamountofCureleasefromtheCu-bearingsteelscouldhaveobviousbio-functionsofreductionofthein-stentrestenosis(ISR),anti-bacterialinfection,inhibitingtheinflammatorycellsandevenpromotingtheearlyosteogenesis.Furthermore,thedegradationofmagnesiumbasedmetalsinbonescouldpromotethenewboneformation,enhancethebonemineraldensityfortheosteoporosismodeledanimal,andevenhavestronganti-bacterialabilityandstrongcytotoxicitytobonetumorcellsduetotheenhancementofpH.Specialbio-functionwithsatisfiedload-bearingcapacityformetallicbiomaterialswillbringhigherapplicationvaluesfortheimplantmadeofthisnovelmaterial.Thisisanattractivedirectionforresearchanddevelopmentwithmanychallenges,butthefinalsuccesswillbemuchbeneficialtothemajorityofpatients.
简介:Usingdirectfinitedifferencemethod,anumericalmodelforsimulatingthetemperaturefieldinthechargeduringinductionskullmelting(ISM)hasbeendeveloped.Onthebasisofthemodel,thetemperaturefieldinTi-47Ni-9Nbingothasbeencalculatedundervariousmeltingconditions.Finally,theprocessingparameters(meltingpower,melting-downtimeandthefinalmelttemperature)havebeenoptimized.
简介:Duetotheminiaturizationofmoderndevicesre-quirecomponentswithlightweight,highintegra-tionandtheabilitytostoreenergyinassmallvol-umeaspossible.Asaresult,energystoragedensitybecomesanimportantfigureofmeritforenergystor-agedevices.Inthispaper,firstly,wediscussedtheenergydensityinfine-grainedleadzirconatetita-nateglass-ceramicscompositewiththehelpofthe
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简介:Highentropyalloyhasattractedincreasingattentions.However,toenhancethealloystrengthoftenleadstoimpairmentoftheductility,orviceversa.HerewereportedaheattreatmentapproachonAlCrFeNi2Ti0.5highentropyalloy,whichcanelevatethestrengthandductilitysimultaneously.AningotofAlCrFeNi2Ti0.5weighing2.5kgwasfirstlyfabricatedbymediumfrequencyinductionmelting.Thensamplesfromthesameheightofthebulkingotwereannealedfor6hat600,700,800and1000℃,respectively.After1000℃annealing,anoptimalmicrostructurewasobtainedbyusingourapproachwhichcanmakesomeprecipitationparticlesdistributehomogeneouslyinthedendriteinteriorwhilekeeptheinterdendritestructureasasinglesolidsolutionphase.ThemechanicaltestonthisAlCrFeNi2Ti0.5alloysampleshowedthat,thecompressivefracturestrengthσbcwasincreasedbyabout600MPaandtheplasticstrainepwasdoubled,comparedwiththoseoftheas-castsample.Ourapproachcanbereadilyadaptedtolarge-scaleindustrialproductionofhighentropyalloyswithhighstrengthandductilitybyproperannealingtreatment.