Strain rate dependent behaviors of a hot isotropically processed Ti-6Al-4V: Mechanisms and material model

论文类型：

期刊论文

第一作者：

Tang, Xiaohan

通讯作者：

Ren, MF (reprint author), Dalian Univ Technol, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China.; Ren, MF (reprint author), Dalian Univ Technol, Dept Engn Mech, Dalian 116024, Peoples R China.

合写作者：

Ren, Mingfa,Bu, Fanzi,Chen, Guoqing,Li, Gang,Li, Tong

发表时间：

2016-02-01

发表刊物：

JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY

收录刊物：

EI、SCIE

文献类型：

J

卷号：

30

期号：

2

页面范围：

661-665

ISSN号：

1738-494X

关键字：

Hot isotropically processed; Casting titanium alloy (Ti-6Al-4V); Dynamic response; Split-Hopkinson pressure bar; Johnson-Cook model

摘要：

Split-Hopkinson pressure bar (SHPB) was adopted to study the dynamic response of a specifically designed Hot isotropically processed (HIP) Casting Titanium alloy (Ti-6Al-4V). The strain-stress curves were obtained in a range of strain rate (10(-3)similar to 2.6x10(3)/s) to study the constitutive relationships and the Johnson-Cook model is developed to describe this dynamic constitutive law. It can be found that the static microstructure of this specific HIP casting Ti-6Al-4V is lamellar structure. When the loading increases (strain rate higher than 10(3)/s), this lamellar structure changes to basket weave structure, which further changes the mechanical strength and plasticity.