深海载人潜水器载人球备选钛合金的断裂韧性试验结果分析.pdf

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1、第16卷第9期2012年9月船舶力学JournalofShipMechanicsV01．16No．9Sep．2012ArticleID：1007—7294(2012)09一1056—08AnalysisonFractureToughnessTestResultsofCandidateTitaniumAlloysUsedinDeepMannedSubmersiblesWANGFang,CUIWei—·cheng,SHENYun-sheng,PANBin-bin(ChinaShipScientificRe

2、searchCenter，Wuxi214082，China)Abstract：Thecurrentmaterialselectionanddesignrulesforthesphericalpressurehull0fmannedsubmersiblespaymoreattentiontothesyntheticpropertiesofmaterialsofinterestforhighsafetyandreliability．Severaltypesoftitaniumalloysaredevelo

3、pedforthispurpose．Damage—tolerantproper—tieswillbeconsideredformoreoptimizeddesignprincipleinthefuture．Fracturetoughnessisoneofthemaindamage～tolerantproperties．Forthematerialselectionanddesignofa4500mdepthmannedsubmersibleinChina，testsusingnon—standards

4、pecimensareconductedontwotypesofcandidateti·taniumalloys．Thicknesseffectisspecificallyinvestigatedusingspecimenswithsimilarligamentsize．AnalysisOilthetendencyofKeandP。jP9datawithincreasingspecimenthicknesswillbeconduct—edinthispaper．Thiswillbeusefulform

5、odifyingthecurrentteststandardforthinnerspecimens．Keywords：titaniumalloys；deepmannedsubmersibles；fracturetoughnesstesting；ligamentsize；specimenthicknessCI。Cnumber：Iy66】．4Documentcode：A1IntroductionThemannedpressurehullofsubmersiblesprovidesasafelivingsp

6、aceforpilotsandscientists，whichshouldbedesignedtohaveenoughstrengthandshouldbeaslightaspossi—ble．Thecurrentmaterialselectionanddesignrulesforthesphericalpressurehullofmannedsubmersiblespaymoreattentiontothesyntheticpropertiesofmaterialsofinterestforhigh

7、safetyandreliability．Damage—tolerantpropertieswillbeconsideredformoreoptimizedde—signprincipleinthefuture。Titaniumalloyswithrelativelyhighductility，maturity，weldingpropertiesandcorrosionresistancearewidelyusedintheexistingpressurehullsofsub—mersibles．Se

8、veraltypesoftitaniumalloysaredevelopedforthispurpose．Fracturetoughnessandfatiguecrackgrowthratearethetwomaindamage—tolerantproperties．Forthematerialselectionanddesignofa4500mdepthmannedsubmersibleinChina，fracturetoughnesstestingi