Penetration Damaging Bahavior of Two Kinds of Bimodal Microstructure of Ti-6Al-4V Alloy

2018 5th International Conference on Advanced Composite Materials and Manufacturing Engineering

Miao, Cheng^1 ; Wu, Hailing^1 ; Yuan, Wei^1 ; Zhong, Tao^1,2 ; Yang, Weiling^1,2 ; Bai, Lihong^1 ; Yang, Lin^1 ; Li, Guofei^1 ; Sun, Sujie^1

No. 52 Institute of China Ordnance Industries, Yantai

264003, China^1

National Key Laboratory of Science and Technology on Materials under Shock and Impact, Yantai

264003, China^2

关键词: Adiabatic shear band;    Bahavior;    Bi-modal microstructures;    Micro-structure evolutions;    Penetration test;    Subgrains;    Ti-6Al-4V alloy;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/394/3/032132/pdf
DOI  :  10.1088/1757-899X/394/3/032132

来源: IOP

【 摘 要 】

Penetration tests of two kinds of bimodal microstructure of Ti-6Al-4V alloy were conducted using 7.62mm piercing incendiary projectiles. Damage appearance of crater, microstructure evolution and characteristics of adiabatic shear band were analyzed. The results showed: 1) Bimodal microstructure included equiaxial and acicular grain. The plasticity of acicular grain was lower than exuiaxal grain, which resulted in more dynamic recrystallization subgrain and bifurcations. 2) The characteristics of adiabatic shear band in two kinds of bimodal microstructure had obvious differences. The adiabatic shear bands in 1# Ti-6Al-4V alloy were reticularly distributed, and the density of adiabatic shear bands was obviously larger than that of.