简介:俯冲带除俯冲板片脱水形成的富大离子亲石元素流体、交代地幔楔形成的岛弧钙碱性玄武岩安山岩-英安岩-流纹岩及相应侵入岩组合外,还存在由俯冲扳片熔融形成的埃达克质熔体交代地慢楔形成的埃达克岩-富铌玄武岩-富镁安山岩组合,从而构成了俯冲带的流体交代与熔体交代两大类壳慢相互作用体系及相应的岩石组合。熔体交代作用的显著特点是Mg、高场强元素Nb、Ti、P等含量增加,Nd/Sr值增高,而Si、K、Na及La/Yb降低。洋壳板片或洋脊俯冲、玄武质岩浆底侵使地壳增厚,或板片断离、撕裂等作用均可产生埃达克质熔体并随之产生熔体交代作用。流体和熔体与地幔橄揽岩的相互作用构成了俯冲带复杂的地球化学体系。
简介:AstudyonhotextrusionofTi-6Al-4Vusingsimulationsandexperiments;Dampingcharacterizationofaluminiumcontaininginterconnectedwirereinforcementusinganovelfiequencydomainbasedmethod;DevelopmentofAl-Si-MgAlloysreinforcedwithBoronCarbideParticles;DevelopmentofAl-Si-MgAlloysreinforcedwithBoronCarbideParticles;
简介:Finiteelementinvestigationsupontheinfluenceofpocketdiedesignsonmetalflowinaluminiumextrusion-PartI.effectofpocketangleandvolumeonmetalflow,InfluenceoftheGeometryoftheExtrusionDieontheMeltStrengthofPolymers,Innovativemanufacturingtechniqueforglassmatrixcomposites:extrusionofrecycled.TVsetscreenglassreinforcedwithAl{sub}O{sub}3platelets,Measurementofdeformationofextrusiondieinhotextrusionofaluminum-deformationofextrusiondieinaluminumhotextrusionⅡ.
简介:Asurveyofmanifolddesignsforflatdieextrusion;CermetDiesforHotExtrusionofHardAluminium;Clustercomputinginnumericalsimulationofextrusionflow;Computeraideddesignandmanufactureofstreamlinedextrusiondies;Depositionofhardfilmsonhot-workingsteeldiesforaluminium;DevelopmentofaremotequickCAEsystemonsculpturedmetalextrusiondiesurface;
简介:AStudyofRadialGearExtrusion,Atheoreticalandexperimentalstudyoffrictioninmetalformingbytheuseoftheforwardextrusionprocess,Deepdrawingandimpactextrusionofmagnesiumalloysatroomtemperature,Effectsofdiegeometryandextrusionspeedonthecoldextrusionofaluminiumandleadalloys,FeatureextractionfromSTEP(ISO10303)CADdrawingfilesformetalformingprocessselectioninanintegrateddesignsystem,Formingfeaturerepresentationandprocessselectionincoldextrusion.
简介:EffectsofaddingLa-richmischmetalonthemicrostructureandmechanicalpropertiesofhotextrudedMg-8Alalloys;Effectsofextrusionconditionsonhotextrudingcharacteristicsofmagnesiumalloy;Expertevaluationofhydraulicpressreliability;ExtrudabilityimprovementandenergyconsumptionestimationinAIextrusionprocessofa7003alloy;Fabricationofcompositepipesbymulti-billetextrusiontechnique
简介:Aluminiumoxidedispersionstrengthenedcopperproducedbythermochemicalprocess;Aninvestigationonthehotextrusionprocessofmagnesiumalloysheet;ComparisonbetweenConventionalPMRouteandCastingMethodtoobtainAMCsReinforcedwithTi-AlParticles;CONFORMprocess:surfaceseparation,curlingandprocesscharacteristicstothewheeldiameter;Determinationofweldingpressureinthenon-steady-stateportholedieextrusionofimprovedAI7003hollowsectiontubes