应力状态对Ti-6Al-4V绝热剪切敏感性的影响  

Influence of Stress-State on Adiabatic Shear Sensitivity of Ti-6Al-4V

作　　者：刘新芹[1] 谭成文[1] 张静[1] 胡阳光[1] 陈志永[1] 王富耻[1] 才鸿年[1] 

机构地区：[1]北京理工大学,北京100081

出　　处：《稀有金属材料与工程》2008年第9期1522-1525,共4页Rare Metal Materials and Engineering

摘　　要：采用分离式Hopkinson压杆技术对双态组织和片层组织Ti-6Al-4V进行了圆柱试样和帽形试样的冲击试验,对比了单轴压缩和压剪复合2种不同应力状态下2种组织钛合金的绝热剪切敏感性差异。结果表明:在单轴压缩状态下片层组织的绝热剪切敏感性要高于双态组织,而在压剪复合应力状态下其绝热剪切敏感性要低于双态组织,即应力状态对材料的绝热剪切敏感性影响显著。In order to reveal the influence of stress state on the adiabatic shear sensitivity, Ti-6Al-4V is heated to get bimodal and lamellar microstructures. The split Hopkinson press bar （SHPB） is used to impact cylinder and hat-shaped specimen, and the difference of the adiabatic shear sensitivity in two kinds of structure under the stress state of single-axis compress and press-shear was compared. The results show that in the case of single-axils compress state, the adiabatic shear sensitivity of the lamellar structure is higher than that of the bimodal, in the case of press-shear state, it is quite the reverse. It reveals the stress state has great influence on the adiabatic shear sensitivity.

关 键 词：TI-6AL-4V 微观组织 绝热剪切敏感性 应力状态 

分 类 号：TG146.23[一般工业技术—材料科学与工程]