简介：Energy-storageweldingconnectioncharacteristicsofrapidlysolidifiedAZ91DMgalloyribbonswith40～70μmthicknessareinvestigatedusingamicrotypeenergy-storageweldingmachine.Themicrostructureandperformanceoftheconnectionjointsareanalyzedandstudied.Theresearchresultsindicatethatenergy-storageweldingisabletorealizethespotweldingconnectionofAZ9lDMgalloyribbons.Theweldingnuggetconsistsofdevelopedα-Mgequiaxedgrainswiththesizesof1.2～2.7μmandintergranulardistributedβ-Mg17Al12compounds.Thethicknessofbondzoneisabout4μmandthesolidificationmicrostructureischaracterizedbythefineequiaxedgrainswiththesizesof0.8～1.2μm,andgrainboundaryhasbecomecoarsening.ThecolumnarcrystalinHAZalsobecomesslightlycoarseningandthegrainboundaryhasbroadened,however,thereisnoobviouschangeinitsprimitivemorphologyandcrystallographicdirection.Whenweldingenergyisabout2.0J,theweldingjointswithhighershearstrengthandsmallerelectricalresistivityareobtained.

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简介：MgAl//2O//4在模仿的身体液体(SBF)提高的Ca/P陶艺的行为被学习。结果显示出那，Ca/P合成陶艺的表面上的生物磷灰石罐头precipitate然而，Ca/P合成陶艺的表面的溶解也由于在提高的温度与Ca/P陶艺通过MgAl//2O//4的反应被生产的一种非结晶的材料发生；因此，在SBF的Ca/P合成陶艺的行为主要取决于那些二个过程。那些二的联合影响的分析处理MgAl//2O//4的低内容赞成的表演因此，生物磷灰石的形成引起更高的简历活动。(编辑作者摘要)23个裁判员。

简介：Lowercontentofcarboncanfurtherimprovethestressrupturelifeofp-modifiedDA718alloyuptomorethan270%.Meanwhile,theductilityofthealloydecreasedalittle.Moreboronatomsdissociateduetodecreasingcarboncontentandinteractwithphosphoruswhichbringsthelongerstressrupturelifeofthealloy.Lesscarbonmayinducemorephosphorussegregatinginthegrainboundaryandresultinbrittleness.

简介：Themicrostructureofthelasermelted1.0%Ctoolsteelhavebeeninvestigated.Theregionaffectedbythelasercanbesubdividedinto3zones,whichconsistofameltedregionatthesurface,azonewithsolidstatetransformationandtheareaadjacenttotheunaffectedsubstratewherecementiteisslightlydissolved.Themeltedzonepossessedacellulargrowthmorphologyconsistingofausteniteandmartensite.Thecarboncontentoftheaustenitewasmeasuredtobeover1wt-%.Agreatdealofretainedausteniteandtwinnedmartensitewerefoundinthefirsttwozones(themeltedandsolidtransformed).

简介：美国Nucor公司报道，他们利用Castrip工艺首次完成累计10万t的生产大关，薄钢板设计厚度在0．7～2mm范围内。

简介：Fe-0.2C-l.5Si-l.67Mn钢受到熄灭并且划分(Q&P)进程，和在在提高的划分温度的马氏体和奥氏体之间的接口移植被观察。接口迁居在constrainedparaequilibrium(用户终端设备)被排除模型。基于“端点”由用户终端设备模型预言接口移植的热力学的条件被分析，也就是说，在在铁酸盐(martenisite)和奥氏体的铁的化学势的差别生产铁原子的驱动力从一个阶段移居到另外的阶段。另外，接口迁居罐头改变奥氏体部分；作为结果，在划分温度的奥氏体部分可能在通过接口移植熄灭温度比那高，但是这现象不能被用户终端设备模型解释。

简介：TheinteractionbetweenZn-AleutecticalloyandAl2O3p/6061Alcompositesinthevacuumfurnacewasinvestigated.Greatattentionhasbeenpaidtotheelementsdiffusion,themicrostructureandformationoftheinterfacebetweenZn-AIeutecticalloyandAl2O3p/6061Alcomposites.ExperimentalresultsshowthatZn-AleutecticalloyhasagoodwettingabilitytoAl2O3p/6061Alcompositesandthewettingangledecreaseswithincreasingthetemperatureinvacuum.Aftertheinteraction,aninteractionlayerformsbetweenZn-AIalloyandAl2O3p/6061Alcomposites.Thephasesintheinteractionlayermainlyconsistofα-Al(Zn),Al2O3andCuZn5resultedfromthediffusionofelementsfromtheZn-Alalloy.SeveralporositiesdistributeintheregionneartheinterfaceoftheZn-Alalloy/interactionlayer.TheamountofshrinkagevoidsintheinteractinglayerisrelevanttothepenetrationofZnelementintoAl2O3p/6061Alcompositeswhichisafunctionoftemperature.SoitisnecessarytolowerheatingtemperatureinordertolimittheZnpenetration.

简介：TheRamanspectraof3%(molefraction)Y2O3-ZrO2(3Y)areobtainedatdifferenttemperaturefrom77Kto853K.Theresultsshowthat260cm-1Egand460cm-1Egmodesonthespectrashifttowardlowerwavenumberwiththeincreaseoftemperature;meanwhile,thecontinuityoftheHalfWidthatHalfMaximum(HWHM)andwavenumber(frequency)ofRamanbandsarebrokenandt-phaseonlypartiallytransformstom-phaseat523K.Basedontheexperimentalresults,thispaperdiscussesthet-phaselatticevibrationof3YandpresentstheimagesofvibrationdisplacementofsixRaman-activemodesfort-phaseofZrO2.TheanalysisindicatesthattherearediversitiesexistinginthedisplacementoftheatomicvibrationofRaman-activemodesbecauseoftheirdifferentsymmetriesatvarioustemperature,whichleadstothedifferentchangetendenciesofRamanbands.Furthermore,theabruptchangesofsomeRaman-activemodesindicatingtheatomicdisplacementareassumedtobethecondensationsofphononmodesinthet→mphasetransition.