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简介：ThearealdistributionofsomeelementsintherareearthbearingspheroidalphasesinpurealuminiumandAl-MnalloyswasstudiedbySIMS(secondaryionmassspectrometry).Theresultsshowthatcerium,iron.siliconandhydrogenaresignificantlysegregatedinthephases.Thustheexistenceofhydrogen-richrareearthbearingeompoundsisconfirmed.Itindicatesthattherareearthshaveahydrogenfixationeffectinaluminiumandaluminiumalloys.

简介：Thispaperdiscussesthemicrostructureofnickel-aluminiumbronzescon-taining（9-10）wt%Aland（0.1～5）wt%Ni,inwhichthreeeutectoidsmayexist.Themorphologiesofα+γ2andα+β’2aresimilarbutthelatterisfiner.Intheα+β’2+γ2eutectoidstructureβ’2ismainlyconcentratedattheα/βboundaries,whileγ2isdistrib-utedinsidepriorBregions.BothK-SandN-Worientationrelationshipsexistbetweenαandβ’2（orγ2）inalloysconsistingofα+β’2orα+γ2.However,ifthealloyconsistsofα+β’2+γ2eutectoid,thelatticesofβ’2andγ2areparallel,bothofthemhavetheN-Worientationrelationshipwithα.

简介：惰性的金属炸药，炸药的一种新类型，是高爆炸、惰性的金属粒子的混合物。当这种炸药被触发时，惰性的金属粒子流动将被开车的爆炸产品形成。为了决定金属粒子的运动的特征，流动，一系列铝盘子被设计是金属粒子流动影响了的目标。测试结果被介绍，一个数字模型被设置分析高速度的影响铝板上的惰性的金属粒子。基于数字分析，在目标板和惰性的金属粒子的起始的条件上的标记的特征之间的关系被建议。从目标盘子上的影响的分析，金属粒子的运动的更多的信息能被重建。

简介：ＰｒｏｃｅｓｓＤｅｖｅｌｏｐｍｅｎｔＡｓｐｅｃｔｓｏｆＡｌｕｍｉｎｉｕｍ－ＴｉｔａｎｉｕｍＭａｓｔｅｒＡｌｉｏｙｓＫｒｉｓｈｎａｎＴ．Ｓ．；ＲａｊａｇｏｐａｌａｎＰ．Ｋ；ａｎｄＢｏｓｅＤ－Ｋ．（Ｍｅｔａｌｌｕｒｇｙ．Ｄｉｖｉｓｉｏｎ，ＢｈａｂｈａＡｔ...

简介：Thereductionofcarbon/aluminapowdermixtureinaflowingnitrogenstreamwasinve-tigatedbythequantitiativeanalysisofX-raydiffraction.Experimentalresultsindicatedthatthereactionratecouldbeincreasedbyincreasingthenitrogenflowrate,ortreatingtemperature,Theratewasalsofoundtobeincreasedbydecreasingthealuminaparticlesizeandinitialbulkdensity,Andthecalcinedaluminawassup-posedtobethesuitablesourceofaluminumox-idecomparedwiththeothertypesofalumina.ThefinalpowderproductofAlNwasobservedbySEMandanalyzedbyaprticle-sizeanalyzer.

简介：Thephenomenonofearingisinvestigatedinthepresentstudybasedonthetheoryofcrystalplasticitywiththedynamicexplicitfiniteelementprogramdeveloped.FirstlytextureanalysisiscarriedoutofrolledaluminiumalloyA15052bymeansofX-raytechnique.Thenfromthetexturecoefficientsananalyticalexpressionfortheorientationdistributionfunction(ODF)isderivedmakinguseofthecomputeralgebraiclanguageMathematica4.0,whichmakesiteasiertodiscretizetheODFintoaseriesofEuleriananglesrepresentingthedistributionoflatticesandfurtherthepreferredorientation(texture)ofcrystalsoftheoriginalsheets.Forthepolycrystalmodel,thematerialisdescribedusingcrystalplasticitywhereeachmaterialpointinthesheetisassumedtobeapolycrystallineaggregateofaverylargenumberofface-centeredcubic(FCC)grainswitheachgrainmodelledasanFCCcrystalwith12distinctslipsystems.ThemodifiedTaylortheoryofcrystalplasticityisusedandonlytheinitialtextureistakenintoconsiderationduringlargeplasticdeformation.Numericalsimulationofearinghasbeenperformedforanaluminiumsheetwithtextureandonewithcrystalsexhibitingrandomdistributiontodemonstratetheeffectoftextureofmaterialsontheirplasticanisotropyandformability.

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简介：把温度分发用作一个外部参数改变对称并且在铝测量声学的回声的频率光谱堵住，我们在混乱台球调查精力层次的统计和动力学。精确地提取回声并且消除噪音的影响，为泛音倒置的一个filter-diagonalization方法被用来为低数量因素回声系统克服常规快Fourier变换方法的低分辨率。我们在场一改善并且试验性地学习量系统的混乱特征的可行模拟方法。

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简介：铝3004的流电的腐蚀行为和有不同区域比率的铜在426天的一个时期上在Tuticorin港口在热带海洋的空气被学习。A的区域比率<潜水艇class=“a-plus-plus”>艾尔：一<潜水艇class=“a-plus-plus”>学习的Cu,是1:1，1:2，1:4，1:8，2:1，4:1与8:1。金属的流电的腐蚀行为由于流电的结合以铝的腐蚀率的相对增加被学习铜，处于铜的腐蚀率的相对减少由于流电的结合到由于流电的结合的pitting的铝的铝，和危险性铜。系统的流电的潜在、流电的水流被监视。从温和蚀刻到穿孔的不同尺寸的坑在与铜的接触在边阶和铝的接口的表面上经验丰富。捱过的参数和在影响金属的流电的腐蚀有一个主要角色的环境污染物质也被监视。源于流电的腐蚀的腐蚀产品用XRD被分析，铝源于流电的腐蚀上的pitting以坑的坑深度，尺寸和密度被加亮，用一台高分辨率显微镜。

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简介：Dual-platestructureisveryeffectiveintheprotectionofspacevehiclefromhypervelocityim-pact.TheexperimentsofA1projectileimpactingA1dualtargetsatthevelocityrangingover2.5—7.0km/sweresystematicallyconducted.Thedamageeffectswereexamined,includingtheperforationoftheshield,thedevelopmentofdebriscloudandthegeneraldamagecharacteristicsofthesubplate.Manyvaluableexperi-mentaldataandphenomenahavebeenobtained

简介：电气化学的实验被执行测试铝锌的腐蚀率热剧降的涂层。5.3%铝锌合金(重量比率)有优异耐蚀性质，这被显示出。坚定的微观结构显示了由纳米组成的非结晶的结构系统的大小的粒子。分析显示了5.3%铝锌系统的吉布斯精力的大否定变化。分子的动力学模拟证明5.3%铝锌系统从另外的系统有很不同的行为。这个特别系统的阶段转变从模拟被观察。转变温度在400K附近被决定。模拟显示5.3%铝锌系统在从300～900K的温度范围上是非结晶的，支持从铝锌合金的非结晶的固体有的实验的推理特殊耐蚀特性。

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简介：Theinfluenceofthehystereticbehaviourinreactivesputteringwithapurealuminiumtargetinthepresenceofargonandoxygenplasmaontransmittanceandsurfacefreeenergyofaluminiumoxidefilmswasinvestigatedbyplasmaopticalemissionspectroscopytechnology.Theevolutionsofaluminium,andaluminiumoxideemissionlinesasfunctionsofoxygenflowrateatconstantpowerandpressurewerestudied.Asteeptransitionfromthemetallicsputteringtothecompoundsputteringwasobserveduponincreasingtheoxygenflowratefrom0.0SCCMtoabove2.0SCCM.Thenanoptimaldepositionzonewasobtainedthroughanalyzingthehystereticcurvesofaluminiumandaluminiumoxideemissionlines.TheevolutionofcrystalstructuresofsampleswasdiscernedbyX-raydiffractionspectradata.EnergydispersiveX-rayspectroscopydataalsodemonstratetherelationshipbetweenthechemicalcompositionsofaluminiumoxidefilmsandthehystereticbehaviour.Thefilmdepositedbetween1.5SCCMand2.0SCCMoxygenflowratedisplaysanoptimalandstoichiometicatomicratioofOtoAlandmassratioofOtoAl.ThechangesinthetransmittanceofsampleswerediscoveredtodependontheoxygenflowratebyUV-VIStransmittancespectra,andthechangesinsurfacefreeenergywerestudiedbycontactanglemeasurement.

简介：在5GPa的高压力和不同温度的Ti2AlN的稳定性7001600?袰？？

简介：Inthepresentstudy,amodifiedHall-Petchcorrelationonthebasisofdislocationpile-upmodelwasusedtoestimatetheyieldstrengthofSiCp/Alcomposites.TheexperimentalresultsshowthatthemodifiedHall-Petchcorrelationexpressedasσcy=244+371λ-1/2fitsverywellwiththeexperimentaldata,whichindicatedthatthestrengthincreaseofSiCp/Alcompositesmightbeduetothedirectblockingofdislocationmotionbytheparticulate-matrixinterface,namely,thedislocationpile-upisthemostpossiblestrengtheningmechanismforSiCp/Alcomposites.

简介：Thixoforging是半固体金属在高稳固的部分处理的一种类型(0.7

简介：Thepapergivesananalysisontechnicalcharacteristicsofrepairtechniquesforfrictionstirweldingdefects.Toovercomethedefects,anewrepairtechnique,inertiafrictionpullplugwelding(IFPPW),wasresearchedanditsequipmentwasdevelopedaswell.ElementarydatumwasachievedbyinvestigatingtheinfluencesoftechnologicalparametersonmechanicalpropertiesandbyanalyzingthestructuralcharacteristicsofrepairjointwithIFPPW.ThestudyshowsthatthestabilityandreliabilityofweldingprocessofIFPPWcanbeguaranteedthroughtheconstantenergyfromtheflywheel.Integratedwiththeadvantagesoffrictionpullplugwelding,theIFPPW,freefrombackanvil,isconsideredasapromisingtechniqueinrepairofterminationkeyholeofbobbintoolfrictionstirweldingandpoint-likedefectsinaluminumalloywelding.