文献类型：期刊文献

英文题名：Dynamic Deformation Behavior and Fracture Characteristics of a near alpha TA31 Titanium Alloy at High Strain Rates

作者：Yu, Weixin[1];Li, Xiaofen[1];Zhang, Jinyong[2];Hou, Shusen[1];Lv, Yifan[3]

第一作者：Yu, Weixin

通讯作者：Yu, WX[1];Zhang, JY[2];Lv, YF[3]

机构：[1]Xinxiang Univ, Sch Mech & Elect Engn, Xinxiang 453003, Henan, Peoples R China;[2]China Univ Min & Technol, Sch Mat & Phys, Xuzhou 221116, Jiangsu, Peoples R China;[3]Luoyang Ship Mat Res Inst, Luoyang 471000, Peoples R China

第一机构：新乡学院机电工程学院

通讯机构：[1]corresponding author), Xinxiang Univ, Sch Mech & Elect Engn, Xinxiang 453003, Henan, Peoples R China;[2]corresponding author), China Univ Min & Technol, Sch Mat & Phys, Xuzhou 221116, Jiangsu, Peoples R China;[3]corresponding author), Luoyang Ship Mat Res Inst, Luoyang 471000, Peoples R China.|[1107111]新乡学院机电工程学院;[11071]新乡学院;

年份：2022

卷号：15

期号：21

外文期刊名：MATERIALS

收录：;EI(收录号：20224613124954);Scopus(收录号：2-s2.0-85141816453);WOS:【SCI-EXPANDED(收录号:WOS:000883486100001)】；

基金：This research was funded by the Key Science and Technology Research Project of Henan Province of China (No. 222102230023), the National Natural Science Foundation of China (No. 51601216), and the Key Scientific Research Projects of Colleges and Universities in Henan Province (No. 22A430035).

语种：英文

外文关键词：TA31 titanium alloy; dynamic impact compression; deformation behavior; microstructure evolution; fracture characteristics

摘要：The quasi-static and dynamic impact compression tests of the TA31 titanium alloy were conducted at the strain rates from 0.001 s(-1) to 4000 s(-1) and deformation temperatures from 293 K to 773 K, and the TA31 titanium alloy showed typical elastic-plastic characteristics. In the initial stage of compression (elastic deformation), the stress and strain are proportional, and the stress-strain curve is a straight line. In the plastic deformation stage, the flow stress decreases significantly with the increase of deformation temperature, while the strain rate has no significant effect on the flow stress during dynamic compression. A constitutive model has been established to predict the flow stress, and the relative error is 2.32%. It is shown by observing the microstructure that when the deformation temperature is 293 degrees C, and the strain rate reaches 1600 s(-1), a shear band with an angle of about 45 degrees to the axial direction of the specimen appears, and the severe shear deformation makes the alpha phase in the shear band fibrous and contains high-density dislocations. The formation process of the shear band and its influence on fracture are analyzed and discussed.