V-5Cr-5Ti的常温动态压缩力学性能

DynamiccompressivemechanicalpropertiesofV-5Cr-5Ti atroomtemperature

1.
InstituteofStructuralMechanics,ChinaAcademyofEngineeringPhysics,
2.
Mianyang621900,Sichuan,China;
3.
SchoolofCivilEngineeringandArchitecture,SouthwestUniversityofScienceandTechnology,
4.
Mianyang621000,Sichuan,China

摘要: 采用分离式霍普金森压杆(SHPB)装置,在常温下对V-5Cr-5Ti合金分别进行了应变率效应试验、限制应变试验和应变累积的动态压缩试验;分析了应变率、应变累积对V-5Cr-5Ti合金动态压缩性能的影响; 并对压缩试验后的试件进行了金相分析。结果表明,V-5Cr-5Ti合金具有明显的应变率和应变历史效应,而应变历史对材料的动态压缩性能的影响更明显。在高应变率下,应变低于0.20时,出现孪晶组织;而应变高于0.20时,孪晶组织急剧减少甚至消失。
- 固体力学 /
- 力学性能 /
- 动态压缩 /
- V-5Cr-5Ti合金 /
- 分离式霍普金森压杆
Abstract: Strainrateeffecttests,limitedstraintestsandcumulatedstraintestswereconductedona vanadium-basedalloy(V-5Cr-5Ti)respectivelybyusingasplit-Hopkinsonpressurebar(SHPB)systematroomtemperature. Theeffectsofstrainrateandstraincumulatingonthedynamiccompressive mechanicalpropertiesofV-5Cr-5Tiwereanalyzed.Themicrostructuresofthespecimensbeforeand afterdynamiccompressionwereinvestigatedbyapplyinganopticalmicroscope.TheexperimentalresultsshowthatthedynamicpropertiesofV- 5Cr-5Tiexhibitobvioussensitivitytothestrainratesand thestrainhistory,andtheeffectofstrainhistoryismoreobvious.Forspecimensathighstrainrates, thetwinsappearwhenthestrainissmallerthan0.20,andthetwinsdecreasewhilethestrainislarger than0.20.
- solidmechanics /
- mechanicalproperties /
- dynamiccompression /
- V-5Cr-5Ti /
- SHPB