固溶和工作温度对TC21钛合金动态压缩性能和绝热剪切敏感性的影响  

Influence of Solution and Ambient Temperature on Dynamic CompressionMechanical Properties and Adiabatic Shear Sensitivity of TC21 Titanium Alloy

作　　者：张俊喜 易湘斌[2] 沈建成[2] 陈百明[1] 李保栋 徐创文 ZHANG Junxi;YI Xiangbin;SHEN Jiancheng;CHEN Baiming;LI Baodong;XU Chuangwen(School of Material Engineering,Lanzhou Institute of Technology,Lanzhou 730050,China;Key Laboratory of Green Cutting Technology and Application in Gansu Province,Lanzhou Institute of Technology,Lanzhou 730050,China)

机构地区：[1]兰州工业学院材料工程学院,兰州730050 [2]兰州工业学院绿色切削加工技术及应用甘肃省重点实验室,兰州730050

出　　处：《材料导报》2020年第24期24092-24096,共5页Materials Reports

基　　金：国家自然科学基金(51865026);甘肃省自然基金(18JR3RA229);兰州市人才创新创业项目(2017-RC-50)。

摘　　要：利用Hopkinson压杆试验系统,在高应变率1500 s-1和不同温度(25~400℃)条件下,研究了固溶温度对TC21钛合金动态抗压性能及绝热剪切敏感性的影响。结果表明,随着固溶温度的升高,TC21合金的高温动态流变应力增大,塑性应变减小,绝热敏感性增大,剪切带宽度减小。分析表明,引起这种变化的主要原因是随固溶温度的升高,合金基体组织中α相的总面积和片层宽度减小。随着工作温度的升高,TC21合金的动态流变应力降低,绝热敏感性增大,剪切带宽度增加。By using Hopkinson pressure bar test system,the dynamic mechanical properties and adiabatic shear sensitivity of TC21 titanium alloy were studied at 1500 s-1 strain rate for different temperatures(25—400℃).The results show that the dynamic strength was enhanced and the adiabatic sensitivity became higher with the increasing of the solution temperature,while the plastic strain and the shear band width were decreased.The main reasons for these changes are the decreasing of the total area and lamellar width ofαphase.At the same time,with the ambient temperature increases,the dynamic compressive strength decreases,the adiabatic sensitivity increases,and the shear band width increases.

关 键 词：TC21钛合金 动态压缩性能 剪切敏感性 微观组织 

分 类 号：TG146[一般工业技术—材料科学与工程]