On kinetics and thermodynamics of high angle grain boundaries in aluminum: experimental study on grain boundary properties in bi- and tricrystals [Elektronische Ressource] / vorgelegt von Vladimir A. Ivanov
167 pages
English

Découvre YouScribe en t'inscrivant gratuitement

Je m'inscris

On kinetics and thermodynamics of high angle grain boundaries in aluminum: experimental study on grain boundary properties in bi- and tricrystals [Elektronische Ressource] / vorgelegt von Vladimir A. Ivanov

Découvre YouScribe en t'inscrivant gratuitement

Je m'inscris
Obtenez un accès à la bibliothèque pour le consulter en ligne
En savoir plus
167 pages
English
Obtenez un accès à la bibliothèque pour le consulter en ligne
En savoir plus

Description

On Kinetics and Thermodynamics of High Angle Grain Boundaries in Aluminum: Experimental Study on Grain Boundary Properties in Bi- and Tricrystals Von der Fakultät für Georessourcen und Materialtechnik der Rheinisch -Westfälischen Technischen Hochschule Aachen zur Erlangung des akademischen Grades eines Doktors der Ingenieurwissenschaften genehmigte Dissertation vorgelegt von Diplom-Ingenieur Vladimir A. Ivanov aus Moskau / Russland Berichter: Univ.-Prof. Dr.rer.nat. Günter Gottstein Priv.-Doz. Dr.rer.nat. Dmitri A. Molodov Prof. Dr.rer.nat. Lazar S. Shvindlerman Tag der mündlichen Prüfung: 13. Januar 2006 Diese Dissertation ist auf den Internetseiten der Hochschulbibliothek online verfügbar CarnegieNoteouldofandthankscarryingIofamcademgratefulytoProf.mscienythankPhDHighthesiseadvisorNL,Prof.vDr.gasrer.ofnat.discussionsG?nyterIMM,Gottstein,eterdirectortheofattheforInstitutusefulf?rthankMetallkundeduringundDmitriMetallphvysikmen(IMM)thanksatytheandRyWTHterestUnivIersitaydynamicsAacouldhen,offorerg,givingtheirmeerthePhoppolishortunitofyoptoorkcarryIoutethiscolleagueswIorkyandespforolesnikkhiseepinghelphisexpfaithatinManmdueyAnscienRollett,ticrialswatork.UnivLotsforofhisthanksmtowmasybmenbtor,intheatleaderIofethebingroup,terfaceonijnendynamicsKircgroupMattissen,ofassistancetheumIMM,usefulDr.Pressurerer.

Informations

Publié par
Publié le 01 janvier 2006
Nombre de lectures 10
Langue English
Poids de l'ouvrage 3 Mo

Extrait



On Kinetics and Thermodynamics of
High Angle Grain Boundaries
in Aluminum:
Experimental Study on Grain Boundary Properties
in Bi- and Tricrystals




Von der Fakultät für Georessourcen und Materialtechnik
der Rheinisch -Westfälischen Technischen Hochschule Aachen


zur Erlangung des akademischen Grades eines
Doktors der Ingenieurwissenschaften


genehmigte Dissertation


vorgelegt von Diplom-Ingenieur
Vladimir A. Ivanov
aus Moskau / Russland



Berichter: Univ.-Prof. Dr.rer.nat. Günter Gottstein
Priv.-Doz. Dr.rer.nat. Dmitri A. Molodov
Prof. Dr.rer.nat. Lazar S. Shvindlerman



Tag der mündlichen Prüfung: 13. Januar 2006



Diese Dissertation ist auf den Internetseiten der Hochschulbibliothek online verfügbar















































CarnegieNoteouldofandthankscarryingIofamcademgratefulytoProf.mscienythankPhDHighthesiseadvisorNL,Prof.vDr.gasrer.ofnat.discussionsG?nyterIMM,Gottstein,eterdirectortheofattheforInstitutusefulf?rthankMetallkundeduringundDmitriMetallphvysikmen(IMM)thanksatytheandRyWTHterestUnivIersitaydynamicsAacouldhen,offorerg,givingtheirmeerthePhoppolishortunitofyoptoorkcarryIoutethiscolleagueswIorkyandespforolesnikkhiseepinghelphisexpfaithatinManmdueyAnscienRollett,ticrialswatork.UnivLotsforofhisthanksmtowmasybmenbtor,intheatleaderIofethebingroup,terfaceonijnendynamicsKircgroupMattissen,ofassistancetheumIMM,usefulDr.Pressurerer.ysicsnat.PDmitriAA.yMoloSciences,docoverativforwsuppandortingdiscussions.mewolikvtoeralltheatywhomears,methismfriendlystaencouragementhere,teciallyandKstimoulatingfordiscussionsinonaluablevinariousoutsci-eri-entstichighandpressure.pyersonalareissues.toIDr.wthonouldD.likProfessoreMate-toSciencethankEngineeringProf.theDr.MellonLazarersitS.,Shfruitfulvindlermanandforinhisinvyaluableticdiscussionsork.andwsuggestions.happItoweouldmemalsoerliktheeterfacetogroupthanktheDoandc.wDr.likhab.toWitoldmem?oersjkthisoPwski,KheadbofDirkthehLabDorotheaoratoryforoffriendlyNanomaterialsand(NL)nofbtheofInstitutediscussions.ofMishin,iiiLaikIunderstandingamydeeplyandthankfulandtostammemyersitstudenandtsyTproatianaconstanGorkyabywledgea,ysicsJennSenioryInstituteRudnizki,hGer-leastritv,EscZhdanoh.amIfriendlywtouldyliktoePtoarethankappreciated.mProf.yDepartmenstudenattDr.assistanoftoratoryTTatianaandGorkmaLastyestaandforvhermhelpforandreading.ptoermanenfortortassistance.encour-HermcreativitinyafterandvhardUSA.wareorkKareAmplehighlyellappreciated.eredMyacdeepdiscussionsestYthanksofgooftoAstronomTMasonatiana,forW.inspirationelloandMaterialsencour-neeringagementhet.StandardsManhnologyycriticalthankstsaretributedduedeeptomaterialsthenotIMMymectohanicalts,wIvorkshoptheirteam,encouragemenesporteciallylife.EricvhcarefulHomann,ofDetlefIFthankfulucSergejhs,oGerdhisScsupphand?tztandagemenAlexduringTyescyhnerGermanforandtheirmhelpleainemantheufacturingManexpthankserimentotaleterdevices.onijnenIerg.wdiscussionsouldwalsore-likbeandtoIexpressknomhelpfulywithgratitudeDr.touriallProfessormtheytcolleaguesPhatandtheyIMM.GeorgeIUnivlikyeandtoJohnnameCahn,HaoFChen,wSytheedScienceBadirijjaman,Engi-TLabalalatAlNationalSamman,ofLuisandAnectonio(NIST),BarralestheirMora,suggestionsEmmancommenuelwhicJannotconandtoPrasadyGurla.erHelpofofscience.AndreasbutBorgardttheinmsolvingdeepmathematicalgratitudesproblemsmandparenfriendlyNadezdadebatesAlexanderareanogreatelyforappreciated.loSpe,ecialtthanksuppgothroughoutesytoAlexeibPrefaceortanTheispropetertiesterfacesofattributedmetallicandmaterialsplaneareolution.stronglyts.inuencedsobtythetheharacteristics,presencespatialofreasoninunderstandingternalininjunctionterfaces.grainGrainnbwthoundaries,andi.e.propingrainterfacesofbonetonwadjoiningeenthediereninclination).tlycorienimptedtalscrystallitesarrangemenofrequiresthei.e.sameplephaseum(grains),junctionsplaofyofaeculiaritiessignicanwtofroletripleinstructuremanAnyfeatureprooundariescessesdepinthermomaterialspropandcrystallographicdetermineofsuctationheencandharacteristicstationofbmaterialsbasisstrength,yfracture,ofplasticitareyt,theelectroresistance,microstructurecorrosionconresistanceofandpmantheiryeothers.junctions,Theandabilitpytheofergrainoundarybpoundariesintowithmobvbeallisgraintheirpmosttra-imptheortanbtrolepropferenertinyand.erties.Theimpmobilittyofofbgrainisbstrongoundariesendencedeterminestheircdynamichangeskineticofertiesmicrostructurethedur-cingrstannealingall,whicmisorienhbcausewrecrystallizationtheandgrainsgrainthegroorienwthofand,graininoundaryturn,(grainde-oundarytermineThatphtheysicalwhandthemecharacteristicshanicalgrainpropoundariesertiessoofortantheformaterials.ofPfundamenolycrystallineofmaterialsevareTherepresentiguoustedtasgrainsanaassemolycrystalblethatofingrainsbsurroundedconnected,bformytripleblinesound-quadru-aries.junctionTheoingrainsAlthougharenequalbinoftheirbphtripleysicalinandolycrystalsccomparablehemicalorderpropmagnitudeertiestheandumverarygraininoundaries,sizefar,andpshapofe.groTheingrainolycrystalsbereoundaries,ditionallyhotowmotionevgrainer,oundariesaretheessenoftiallydif-WTHvinjunctionsenergywofasthereducedandtograincinharacterizeonthermowdynamicallytecpredictedinuenceequilib-stillriumvanglesvatInstituttheuscriptlinethewherebtheofbpresenoundariestricrystalmeet.ChapterHoonwmobilitevaer,AunderthecertainstudiescircumstancesvgrainDynamicsgroMetallphwththeintopquestionsolycrystalshievcanresearcbjunctions.e1,conincludingtrolledbb2,yIntheds,mobilittytoofoundarytripleedjunctions.um.Studies,onfromptheoryolycrystalsoundarycanabonlyissuesyieldandtheerimenaerformedvtheeragedydataInonofgrainMetallkundebderound-hen.arytandetriplelighjunctionunsolvproppresenerties.tThetssperimeneciconproblemsandofofmicrostructureInevfundamenolutionbstructurestructural,andimpuritmigrationyIn,erimenpressureareandbicrystaldrivingwthforceecimendepequip-endencereviewofisgrainofbgrainoundaryenandoftriplebjunctionofmobilitoundaryyycan,istherefore,farbformingegeneralizedaddressedofonlybinmigration.expddressingerimenotseanddeterminedatomisticgoalscomputerdirectionssimexpulationstalonpindividualograinerblastoundarieseandearstriplethejunctions.terfaceDespiteGroupofthethef?rnundumerousysikinRvAacestigationsInonpresengrainmanbwoundaryattemptmigration,shedthetphsomeysicaledmecandhanismstunderlyingrecenthisacproemencessinareexpstilltalobscure.hItgrainisoundarieswtripleorthOutlineemphasizingthisthatork:theChaptercurrenthettalsunderstandinggrainofoundaries,thetheirfundamenandtals,ofgraingrainoundarybareoundaryted.migration,Chaptersucexphtalashniquesthediscussed.relationshipparticular,bandetgrowmethoeenspgrainfabricationbmeasuringoundarymenstruc-aretureed.and3mobilitdedicatedystudies,thetheofeectbofori-solutes,tationshearmigrationstresscurvandgrainmagneticoundaryeldbicrystalsonalumingrainbharacteristicsvierrors.Chaptered.4ducespresenthermotsterials,thejunctionresultstoofvthedstudiesinformationoftricrystalsinbteractionsChapterberimenetthewoundarieseenbtheutilizedmoe-v-coningygrainofbexpoundaryonandandtheisexternalincrystalnewsurface.methoPoneotentaltialgraindragstheofofthe."surface"approactriplethisjunctionitsandareofAppthethethermalthegrousedoorienvbi-eanalysisaremenanalyzed.magnesiumAnisotropgrainyoundaryoftriplethemobilitiesexternalstudied.crystal6surfacetroandaitsexpeecttalondgraindeterminebofoundaryfundamenmotioncareofcomprehensivbelydiscussed.freeChapterolume5graintreatsoundarymigrationTheofdynamicconnectedhgraininbmethooundariesand(grainpbculiaritiesoundariesreviewwithTheaendicestripletainjunction)referenceinonaluminpuritumofdopma-edthebtationystudiedmagnesium.andTheandimpactofoferi-solutetalatomsof.ConPrevioustenvingtstricrystalsNote.ofSEMthanks.iiManPreface.iv.1.Theoreticalharacterbac.kground.and.previousofstudies.1erimen1.1.Structureforand.energy23of.grainyberimenoundaries....F.....ecimens.ary............1X-ra1.1.1tracInintro.duction.andprodenitions..of.motion.oundary.............17.of.......201of1.1.2theGrainbb.oundary.structure.and.energy....2.2.tec...........22.metho2tin1.2ofGrainter-bsolidsoundary.motion......In-Situ.in.....3.oundary.b.3.1.grain.y...3.2..............10.1.2.1.F.undamen.tals2.1.2.abrication.planar...............2.1.3.ufacture.sp.for.study.grain.ound-.migration............10.1.2.2.Driving.force.for.grain20bExpoundarytalmigrationhnique..............12.1.2.3.Drag.eect.during2.2.1grainybdoundaryconmotionuous.king.mo.in.faces.crystalline....15.2.Measuremen.t.of.grain.b.oundary2.2.2mobilitannealingycedure16the2.1.Bicrystal/tricrystal.metho.d..25.Eect.b.c.on.oundary.26.Anisotrop.of.b.mobilit...studies...26.Exp.tal....16.2.1.1.F.abrication.of.planar.bicrystals..........32.< >
< >
< >
.oundary.orienatomstation.oninthejunctionmotion.oftripleEect.1115.33.3.tilt.b.oundaries.in.Alriple...........b.orien.4.4.2...112...71...84.t...86...Migration.T.........mobilit34.3.495Motion95of103mixed.tilt-t.wist.curv.ed.grain4.4.3binoundaries.............36grain3.4.1umShapmagnesiume.of.mo.ving.grain.b.oundary..junctions...and.crystals.............5.4.oundary38.3.4.2.Misorien.tation.depMgendence.ofMggrain.bwithoundary.mobilit.y.45.3.4.3erimenComp.ensation.eect........of.b.bicrystals.............Summary............45.3.5MotionSummaryoundaries.in.with.tration.5.1.drag...........Previous.............89.individual.....89.junction.gro.p........50.4.Impact.oferimenexternal.crystal.surface.on.the.motion.ofofsolitarygraingraintripleb.oundaries.in.bicrystals.53.4.1.In.teraction.ofEectmoonvingmobilitgrain.bEectoundaryonwithyexternal.crystalene

  • Univers Univers
  • Ebooks Ebooks
  • Livres audio Livres audio
  • Presse Presse
  • Podcasts Podcasts
  • BD BD
  • Documents Documents