Al-Pb合金组织性能及高温变形行为研究

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1、哈尔滨工程大学硕士学位论文AbstractTheAI-Pballoywasfabricatedbymechanicalalloyingandvacuumhot-pressedsinteringandhotextrusion．ThemicrostructureofalloywasanalysedbyXRDandTEM．Thetensilepropertiesatroomtemperature，anddampingpropertieweremeasured．Hotcompressionpropertywasstudie

2、d．RadiationprotectionpropertyWasmeasured．TheprocessofmechanicalalloyingofAl-PballoyWasinvestigatedalloybySEMandXRD．TherestultsshowedthatnoreactinoccurredbetweenAIandPb．Withthemillingtimeincreasinginmechanicalalloyingprocess，PbparticlessizedecreasedandfinaUyten

3、dedtobestable．Intheprocessofalloying,Al-PballoyWasimpactedbysteelballs．Thedeformation，coldweldingandfragmentationaffectalloying．Atthesametime，the莎ainsizeofthealloyalsodecreasedwithmillingtimeincreasing,andWastendedtobestableafteraperiodoftime．Thealloyrepareing

4、vacuumhotpressingandhotextrusionwasinvestigatedbyXRD．Therewasalsononewphase．AI-PballoyWasobservedbySEM．HotextrusioncouldeffectivelyrefinethePbparticles，becauseliquidphasePbwasaffectbyAImatrixduringtheextrusion，andWasbrokenintomoresmallparticles．Thetensileprope

5、rtiesatroomtemperatureweremeasured．Becauseoftheroleofthefine—grainstrengthanddispersionstrengthwhichisduetothedistribution0fPbparticles，AI—PballoymechanicalpropertyisbetterthanpureAI．RadiationprotectionWascalculated．Throughthedampingtemperaturespectiumtest，AI-

6、PballoydampingperformanceWasstudied．ItsdampingpeakscomefromthegrainboundaryslidingandliquidphasePb，respectively．ThehotdeformationbehaviorofAI—PballoysWasanalyzed．TheapparentactivationenergyWascalculated．Theflowstressequationwasestablished，andⅡ哈尔滨工程大学硕士学位论文thet

7、hermaldeformationprocessiscontrolledbyheatactivation．Keywords：A1一Pballoy；mechanicalalloying；hotdeformation；dampingcapacity；radiationprotectionpropertyⅢ哈尔滨工程大学硕士学位论文目录第一章绪论⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯。11．1研究背景⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯。11．2舢．Pb合金研究现状⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯

8、⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯31．2．1A1．Pb合金的结构特点⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯31．2．2A1．Pb合金的力学性能⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯41．2．3甜．Pb合金的制备方法⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯．51．2．4A1．Pb合金目前应用状况⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯81．3热挤压工艺⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯