金属间化合物大晶粒超塑性变形机理Superplasticty in Large-grained Intermetallics
胡静,林栋樑
摘要(Abstract)：
在所研究的Fe3Al,Fe3Si,FeAl,Ni3Al,NiAl和TiAl等金属间化合物中均发现大晶粒超塑性。显微分析表明 ,超塑性变形过程中晶粒明显细化 ;电子背散射衍射 (EBSD)技术和透射电子显微学(TEM)分析表明 ,大晶粒金属间化合物超塑变形过程中形成了大量亚晶界网络 ,且随变形量增大 ,亚晶界不断吸收晶内滑动位错 ,使其位向差不断增大 ,从而逐渐演变成小角度和大角度晶界 ,即超塑性变形过程中产生了连续动态回复与再结晶 (CDRR)。高温塑性变形是通过位错的滑移和攀移进行的 ,而亚晶界的迁移、滑动和转动起到协调变形的作用 ,保持了材料在宏观上的超塑性
关键词(KeyWords)： 金属间化合物;大晶粒;超塑性;连续动态回复与再结晶;机理
基金项目(Foundation): 国家自然科学基金重大项目资助 (598951 50 )
作者(Author): 胡静,林栋樑
参考文献(References)：
- 1 GriffithsP ,HammondC .Superplasticityinlargegrainedmaterials[J].ActaMet,1972,20:935.
- 2 HanadaS ,SatoY ,WatanabeS ,IzumiO .Plasticdeformationofsendustpolycrystall[J].JIM ,1981;1285.
- 3 LinDongliang,ShanAidang,LiDingqiang.SuperplasticityinFe3AlTialloywithlargegrains[J].ScrMetallMater,1994,31:1455～1460.
- 4 LiDingqiang,ShanAidang,LinDongliang.StudyofSuperplasticDeformationinaFeAlBasedAlloy[J].ScriptaMetallMater,1995;33:681.
- 5 LinDongliang,ShangAidan,ChenMingwei.SuperplasticityofLarge grainedFe3AlAlloys[J].Intermetallics,1996,4(6):489.
- 6 LinDongliang,LiDingqiangLiuYi.,Superplasticityinlarge grainedFeAlbasedintermetallicalloys[J].Intermetallics,1998,6(4):243～256.
- 7 LinDongliang,LiuYi.Microstructureevolutionandmechanismsofsuperplasticityinlarge grainedironaluminidesduringsuperplasticdeformation[J].MaterSciEng,1999,A268:83～89.
- 8 LinDongliang,LiuYi.Anelectronback scattereddiffractionstudyonthemicrostructuralevolutionandmechanismsofsuperplasticityinlarge grainedironaluminides[J].MaterialsScienceandEngineering,2002,A329:863～871.
- 9 谷月峰,林栋,单爱党,刘 毅,刘震云.晶粒尺寸为1030μm的Ni3Al基合金的超塑性行为[J].金属学报,1996,32(11):1144～1148.
- 10 谷月峰,林栋,单爱党,刘 毅,叶 伟.定向凝固Ni3Al合金高温变形行为的研究[J].金属学报,1997,33(3):325～329.
- 11 SunFen,LinDongliang.Superplasticphenomenoninalarge grainedTiAlalloy[J].ScriptaMater,2001,44:665～670.
- 12 JiangDongmei,LinDongliang.Superplasticityofsingl phaseNi40Alintermetallicswithlargegrains[J].MaterSciLett,2002,21:505.
- 13 JiangDongmei,Lin.Dongliang.Superplasticityofsingl phaseNi45Alintermetallicswithlargegrains[J].MaterLett,2002;57:747～752.
- 14 DuX .H .,GuoJT ,ZhouBD ..SuperplasticityofstoichemicalNiAlwithlargegrains[J].ScriptaMater,2001,45(1):69～79.
- 15 KimWY ,HanadaS ,SakaiT .SuperplasticdeformationofborondopedFe18at,%Si[J].MaterSciEng,1998;A248:78.
- 16 LinDongliang,HuJing.SuperplasticityinLargeGrainedIntermetallics[J].JournalofAdvancedMaterials,(inpress)
- 17 胡 静,林栋.金属间化合物超塑性变形行为[J].机械工程材料,(待发表)
- 18 DingleyDJA .ComparisonofdiffractiontechniquesfortheSEM[J].ScanElectronMicosc.1981,4(1):273～277.
- 19 ChuJP ,LiuIM ,WuJH ,etal.Superplasticdeformationincoarsed grainedFe27Alalloys[J].MaterSciEng,1998,A258:236～242.
- 20 ChuJP ,WuJH ,YasudaHY ,UmakoshiY ,InoueK .Electronbackscattereddiffractionstudyonsuperplasticpropertiesofcoarsed grainedFe27at%Al[J].Intermetallics,2000,8(1):39～46.
- 21 NiehTG ,WadsworthJ.Microstructuralcharacteristicsanddeformationpropertiesinsuperplasticintermetalics[J].MaterSciEng,1997,A239240:88～96.
文章评论(Comment)：
|
||||||||||||||||||
|
||||||||||||||||||