nanoscale投稿模板Word格式文档下载.docx

nanoscale投稿模板Word格式文档下载.docx

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　　ScientificReports

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　　LondonN19XW,UK

　　DearEditor:

　　Pleasefindattachedourmanuscriptentitled“Anewinsightintoductilefractureofultrafine-grainedAl-Mgalloys”whichwewishtosubmitforpossiblepublicationinScientificReports.Thismanuscript,oranypartofit,hasnotbeenpublishedandwillnotbesubmittedelsewhereforpublicationwhilebeingconsideredbyScientificReports.ThemanuscripthasnotbeendiscussedwithaScientificReportsEditorpriortosubmission.Theauthorsdeclarethattherearenocompetingfinancialinterests.

　　Theauthorshaveacollectiveresearchbackgroundunifyingnanoscalematerials,metalsandalloys,compositematerials,fractureanddamagemechanics,appliedphysics,andmechanicalproperties.Inthecurrentstudy,wehavediscoveredarelationshipbetweentheductilefracturemechanismandgrainrefinementofultrafine-grained/nanostructuredmetals.Wefoundthatthemeangrainsizeatfractureendapproachesthetheoreticalminimumachievablemeangrainsizevaluethatdirectlydeterminesthefracturebehaviorofmetalspostnecking.Thisfindingwillbeamilestoneinfracturemechanicsandnanostructuredmaterials.Thusthisworkwillbeofgreatinteresttoreadersofvariousscientificdisciplines,inparticularmaterialsscientistsandphysicistsworkingonnanostructuredmaterialsaswellasmicromechanics.

　　Inthepast50years,manyductilefracturecriteriahavebeenproposed.Thebasicprinciplesuponwhichductilefracturecriteriaarebasedcanbegenerallydividedintofourcategories:

（a）energydissipation;

（b）voidgrowth:

materialmodeling;

（c）voidgrowth:

growthmechanisms;

and（d）voidgrowth:

voidgeometry.Itisassumedthatthefractureevolutiondirectlydependsonthestrength,strainhardeningcapabilityandstrainratesensitivityofthematrixsurroundingthevoids.Noneofthesecriteriaarerelatedtothemicrostructurechangeinductilefractureprocessing.Inthecurrentstudy,itisproposedforthefirsttimethatfeaturesofthemicrostructurenearthefracturesurfacecanbeusedtoexplaintheductilefracturepostneckingdirectly.Wefoundthatgrainsarerefinedtonanoscaleapproachingthetheoreticalminimumachievablevalueandbecomebrittleintheshearbandzone.Asexplainedinthepaper,theobservationsuggestedtheinnovativefive-stepductilefracturemechanism:

uniformelongation,voidnucleationandgrowth,localnecking,grainrefinementuntilthemeangrainsizeapproachestheminimumachievablemeangrainsize,andfinallydamage.

　　ThecorrespondingauthorisDr.HailiangYu,SchoolofMechanical,MaterialsandMechatronicsEngineering,UniversityofWollongong,Wollongong,Australia,contactablebyemailaddressor.Theprimaryworktelephonenumberis+61（04）25055006andfaxnumberis+61（02）42215474.

　　Thankyouforyourkindconsideration.

　　近年笔者发表的主要论文

　　1.Yu*,TieuK.,LuC.,LiuX.,LiuM.,GodboleA.,KongC.,QinAnewinsightintoductilefractureofultrafine-grainedAl-Mgalloys.ScientificReports,XX,5:

9568.Freeaccessavailablefrom:

　　2.Yu*,TieuK.,HadiS.,LuC.,GodboleA.,KongC.Highstrengthandductilityofultrathinlaminatefoilsusingaccumulativerollbondingandasymmetricrolling.MetallurgicalandMaterialsTransactionsA,XX,46:

869-879.

　　Availablefrom:

　　3.Yu*,TieuK.,LuC.,KongC.AbnormallyhighresidualdislocationdensityinpurealuminumafterAl/Ti/Allaminateannealingforsevendays.PhilosophicalMagazineLetters,XX,94:

732-740.

　　Freeaccessavailablefrom:

　　4.Yu*,TieuK.,LuC.,Lou,Liu,GodboleA.,KongC.TensilefractureofultrafineAl6061sheetsbyasymmetriccryorollingformicroforming.InternationalJournalofDamageMechanics,XX,23:

1077-1095.

　　5.Yu*,TieuK.,LuC.,LiuX.,GodboleA.,Li,KongC.,QinAdeformationmechanismofhardmetalsurroundedbysoftmetalduringrollforming.ScientificReports,XX,4:

5017.

　　6.Yu*,TieuK.,LuC.,GodboleA.Aninvestigationofinterfacebondingofbimetallicfoilsbycombinedaccumulativerollbondingandasymmetricrollingtechniques.MetallurgicalandMaterialsTransactionsA,XX,45:

4038-4045.

　　7.Yu*,Liu,Li,GodboleA.Crackhealinginalow-carbonsteelunderhotplasticdeformation.MetallurgicalandMaterialsTransactionsA,XX,45,1001-1009.Availablefrom:

　　8.Yu*,LuC.,TieuK.,GodboleA.,SunY.,LiuM.,Su,Tang,KongC.Fabricationofultrathinnanostructuredbimetalfoilsbyaccumulativerollbondingandasymmetricrolling.ScientificReports,XX,3:

2373.

　　9.Yu*,TieuK.LuC.,Liu,GodboleA.,KongC.Mechanicalpropertiesof