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简介：Themultilayered7XXXseriesaluminumalloywasimpactedby7.62mmogivalprojectilesatvelocitiesrangingfrom787to851m·s~(-1).Thedeformedmicrostructureundervariousimpactingvelocitiesandfracturesurfacesofdifferentsectionswereinvestigatedatdifferentphysicalscalestodeterminetheprocessoffailure.Opticalmicroscopy(OM),electronback-scattereddiffraction(EBSD)andscanningelectronmicroscopy(SEM)wereusedintheinvestigation.Theresultsshowthatcraterisconstrainedinthe7B52frontlayerandtwotypesofadiabaticshearbandswhicharetransformedbandsanddeformedbandsanddifferenttypesofcracksareobserved.Spallfractureisthesignificantfailuremodeof7B52frontlayer,andtheresultingdelaminationleadstothepresenceofbendingtensilefractureinsteadoftheshearplugging.Theductile7A01layerbluntsanddeflectsthespallcracktips,preventingthetargetsfromfullspall,andinducesaconstraintof7A52rearlayer.Theleveloftheconstraintdeterminesdifferentfracturemodesof7A52layer,accountingfortheasymmetryofdamage.

简介：Asameansofsurfacemodificationprocess,metalsurfacenanocrystallization(MSN)hasattractedwidespreadattentionandenjoyedagreatprospect.However,currentlylittleresearchiscarriedoutregardingMSNofweldedjoint.Theprocessesofhighenergyshotpeening(HESP)technologyandultrasonicimpacttreatment(UIT)werecarriedouttoachievejointsurfacenanocrystallization.ThegrainsizeofbeforeandaftertheweldedjointsurfacenanocrystallizationwerecomparativelyanalyzedwithX-raydiffractometer,thesurfacedeformationlayerthicknessofbeforeandaftertheweldedjointsurfacenanocrystallizationwerecomparativelyanalyzedwithopticalmicroscopy,thesurfacehardnessofbeforeandaftertheweldedjointsurfacenanocrystallizationwerecomparativelyanalyzedwithmicrohardnessmachine.TheresultsshowthatbothoftheprocessescanachieveweldedjointsurfacenanocrystallizationandtheweldafterHESPhavesmallergrainsize,largerdeformationlayerthicknessandhigherhardnessvaluesthanthoseafterUIT.However,HESPisrestrainedbytheshapesandsizesofweldingmaterials,sotheUITprocessispreferredtouseinthegeneralengineeringpracticalapplications.

简介：四个参数，煤气的流动，旋转速度，精制时间，和炖的时间的效果，在7075的旋转impeller精炼上，艾尔被学习。C2精制的Cl6，精制的旋转impeller，并且7075艾尔合金的合成精制与对方相比。结果证明旋转impeller精炼的最大的影响参数是旋转速度，由煤气的流动，精制时间，和炖的时间列在后面。直角的分析获得的最佳纯化参数如下：400r/min，0.4mL/h的惰性的煤气的流动，15min的精制时间，和6min的炖的时间的转子速度。最好的排除效果能被C2Cl6和旋转impeller。C2Cl6,旋转impeller，并且合成精制分别地是34.5%，69.2%，和78%。旋转impeller精制的标本的机械性质比由C2精制的Cl6，但是比那些低由合成精制。

简介：Obtainingtheimageofmoltenpoolaluminumalloy'stungsteninertgas(TIG)weldingbecomesachallengingproblemintheweldingfield.Inthispaper,abran-newopticalsensorbasedanalyzingthelightspectrumwasdesigned,andtheclearimageofthemoltenpoolduringthealuminumalloy'sweldingusingthecommonindustrialCCDcamerawasobtained.Andwiththenewalgorithmprovidedbymyself,thedesirablecharacteristicparametersofthemoltenpoolofaluminumalloy'sweldingwereobtained,anditprovidesagoodbaseforadvancedmonitorweldingquality.

简介：为商业地制作的合金的三种典型产品状态的微观结构2195被观察。热转动的板被包含罚款的含纤维的结构描绘，这被发现，polygonized基础；并且滚动寒冷的表被包含高密度脱臼房间的pan-caked谷物结构描绘。脾气被证明包含大量散、塑造板的T1(Al2CuLi)的在近的山峰老化下面的产品猛抛，和theta的小部分；“(Al2Cu)盘子，展出机械性质的理想的联合。用扫描电子显微镜学的分析表明许多粗糙的、不规则形状的Al7Cu2Fe成分粒子处于所有产品状态存在，它显示中间的热处理几乎没在这个引起铁的、有害阶段上有小影响。为合金2195的不同产品状态的微观结构的形成和进化在商业生产条件的看法点被讨论。

简介：Inthispaper,thebrazingmechanismofLY12aluminumalloyatmiddlerangetemperaturewaspresented.TheCsF-AlF3non-corrosivefluxwasutilizedtoremovethecomplexoxidefilmonthesurfaceofLY12aluminumalloy.TheresultsrevealedthattheoxidefilmwasremovedbytheimprovedCsF-AlF3fluxaccompaniedwiththeoccurrenceofreactionaswellasdissolutionandthecompoundsCsFplayedanimportantroletoremovetheoxidefilm.Actually,thehighactivityofflux,say,theabilitytoremovetheoxidefilm,wasduetothepresenceofthecompounds,suchasNH4F,NH4AlF4andcompositemoltensalt.TheproductionofHFwasthekeyissuetoacceleratethereactionandenhancetoeliminatetheoxidefilmbydissolution.ItwasfoundthattherareearthelementLaatsmallpercentagewasnotenrichedattheinterface.Moreover,therareearthfluorideenhancedthedissolutionbehavior.

简介：Fromtheviewpointofweldingmechanics,twonewweldingmethods-weldingwithtrailingpeeningandweldingwithtrailingimpactiverollingwereintroduced.Foraluminumalloythin-shellstructureswithhighstrength,weldingwillleadtohotcracking,poorjointanddistortion.Inordertosolvethem,trailingimpactivedevicewasusedbehindweldingtorchtoimpactthedifferentpositionsofweldedjoints,thusrealizingtheweldingwithfree-hotcracking,lowdistortionandjointstrengthening.Byuseofimpactiverollingwheelsinsteadofpeeningheads,theoutlookofweldedspecimencanbeimprovedandstressconcentrationatweldtoescanbereduced.Equipmentofthistechnologyissimpleandportable.Itcanusedtoweldsheets,longitudinalandring-likebeamsoftube-likestructures,aswellasthethin-shellstructureswithclosedweldssuchasflangesandhatches.Sothetechnologyhasthewideapplicationforegroundinthefieldsofaviationandaerospace.

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简介：微观结构和2519A铝合金板的机械性质上的Yb内容的效果借助于张力的测试，光显微镜学，传播电子显微镜学，扫描电子显微镜学和X光检查衍射计被调查。结果显示出Yb增加的0.17%的那增加(集体部分)密度“2519A合金板和还原剂的粒子变粗的速度率”在300牣獯潣楰?桰獡?楦汥?瑳摵?的阶段湯愠楧杮戠桥癡潩?景丠???娷?愠汬祯

简介：VBHF(可变空白的持有者力量)优化策略被采用决定最佳的时间变量和空间变量的BHF轨道，瞄准与铝合金表改进汽车面板的formability。策略基于适应模拟被实现模拟周围在单人赛为Numisheet'05甲板盖的每个分割的文件夹计算批评起皱BHF。在最佳的VBHF和经常的BHF下面的印上的部分的厚度比较证明分别地，四节的变化被70%，44%，64%和61%减少它在厚度分发和变化控制显示重要改进。通过种类路径比较的调查揭示formability改进的基本原因。学习与铝合金表证明新VBHF优化策略的适用性到复杂部分。

简介：DeepcryogenictreatmenttechnologyofelectrodesisputforwardtoimproveelectrodelifeofresistancespotweldingofaluminumalloyLF2.Deepcryogenictreatmentmakeselectrodelifeforspotweldingaluminumalloyimprove.Thespecificresistivityofthedeepcryogenictreatmentelectrodesistestedandexperimentalresultsshowthatspecificresistivityisdecreasedsharply.ThetemperaturefieldandtheinfluenceofdeepcryogenictreatmentontheelectrodetiptemperatureduringspotweldingaluminiumalloyisstudiedbynumericalsimulationmethodwiththesoftwareANSYS.Theaxisymmetricfiniteelementmodelofmechanical,thermalandelectricalcoupledanalysisofspotweldingprocessisdeveloped.Thenumericalsimulationresultsshowthattheinfluenceofdeepcryogenictreatmentonelectrodetiptemperatureisverylarge.

简介：Thehigh-speedcamerasystemanddataacquisitionsystemofweldingparameterswerecreatedintandemMIGweldingofhighstrengthaluminumalloy.Theexperimentswerecarriedoutinordertoobtainthephotosofdroplettransferunderdifferentweldingparametersinpulsedmode.Thedroplettransfermodeof"onepulseonedroplet"becomesthepreferredselectionduringweldingprocessbecauseofitsstableprocedureandsoundweldform.Theparameterrangesforcorrespondingtransfermodewereexperimentallyachieved,amongwhichthestabledroplettransfermodeof"onepulseonedroplet"canberealized.Theseeffortsbravethewayforcontrolweldheatinputandweldformationinthefuture.

简介：变丑行为，温度进化和联合效果在形成形成的部件的过程和质量上有重要影响，它处于良好的竟技状态在由于装载路径和处理参数联系的复合的复杂性装载的多方法下面的铝合金7075生气阀门的过程是很复杂的。这个过程的一个模型基于联合thermo机械的有限元素方法在DFEORM-3D环境下面被开发。在模型，常规等温的过程模型和非等温的过程建模的二个过程之间的比较在这发展了学习，被执行，并且结果显示热事件起在形成在装载的多方法下面的过程的铝合金的一个重要作用。提起的温度域和紧张的分布和进化被非等温的过程模拟获得。处于良好的竟技状态生气阀门的过程的塑料地区和它的扩展被分析。结果可以为装载形成计划的多方法的决心提供指南，装载形成的十字调节阀门部件。

简介：Plasma-MIG(metalinertgasarcwelding)hybridweldingof6061aluminumalloywith6mmthicknessusingER5356weldingwirewascarriedout.Themicrostructuresandmechanicalpropertiesoftheweldedjointwereinvestigatedbyopticalmicroscopy,X-raydiffraction(XRD),energydispersivespectroscopy(EDS),tensiletest,hardnesstestandscanningelectronmicroscope(SEM)wereusedtojudgethetypeoftensilefracture.Theresultsshowedthatthetensilestrengthofweldedjointwas142MPawhichwas53.6%ofthestrengthofthebasemetal.Theweldingseamzonewascharacterizedbydendriticstructure.Inthefusionzone,thecolumnargrainsexistedatonesideoftheweldingseam.Thefibrousorganizationwasfoundinthebasemetal,andalsointheheataffectedzone(HAZ)wheretherecrystallizationoccurred.TheHAZwastheweakestpositionoftheweldedjointduetothecoarseningofMg_2Siphase.Thetypeoftensilefracturewasductilefracture.

简介：Thispapermainlyconcentratedonthefeasibilityoffrictionstirweldingofdissimilarmetalofaluminumalloytocopper(T2)andapreliminaryanalysisofweldingparametersinfluencingonthemicrostructuresandpropertiesofjointwascarriedout.Theresultsindicatedthatthethicknessofworkpieceplayedanimportantroleintheweldingparameterswhichcouldsucceedinthefrictionstirweldingofdissimilarmetalofcoppertoaluminumalloy,andtheparameterswereprovedtobeanarrowchoice.Theinterfacialregionbetweencopperandaluminuminthedissimilarjointwasnotuniformlymixed,constitutedwithpartofincompletemixingzone,completemixingzone,dispersionzoneandthemostregion’sboundarywasobvious.Meantimeakindbandedstructurewithinhomogeneouswidthwasformed.TheintermetalliccompoundsgeneratedduringfrictionstirweldingintheinterfacialregionweremainlyCu9Al4,Al2Cuetc,andtheirhardnesswashigherthanothers.

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简介：Al-5Ti-0.5C-8Sr(集体部分，%)主人合金用一个melt反应方法被准备。微观结构和主人合金的合成过程被光显微镜学，X光检查衍射，扫描电子显微镜学和X光检查调查精力散的光谱。结果证明主人合金由组成一(艾尔)，TiAl3，TiC，Al4Sr和Al-Ti-Sr分阶段执行。主人合金的合成机制如下：TiAl3通过在K2TiF6和艾尔之间的反应被形成在基础材料的部分融化层融化在850个C粒子与同类地分布式的加强在超声的行动和一张契约下面被变成液体filler在团结以后被获得。体积部分原文如此，在契约的粒子能被改变以铜锌金焊接的温度改变。最大值原文如此，契约材料的粒子体积部分在brazi到达了37%？