Quasi-Static and Dynamic Properties of Ti-3Al-2.5V Titanium Alloy Tubes

4th Annual International Workshop on Materials Science and Engineering

Liu, Rui^1 ; Li, Yang^1

State Key Lab of Nonferrous Metals and Processes, GRIMAT Engineering Institute Co. Ltd, Beijing

100088, China^1

关键词: Dynamic compression;    Dynamic plasticity;    Dynamic property;    Dynamic strength;    Extrusion billets;    Outside diameter;    Split Hopkinson pressure bars;    Titanium alloy tube;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/381/1/012167/pdf
DOI  :  10.1088/1757-899X/381/1/012167

来源: IOP

【 摘 要 】

This paper aimed to study the quasi-static and dynamic properties of Ti-3Al-2.5V titanium alloy seamless tubes. The extrusion billets were hot extruded, and then multipass cold rolled into tubes with outside diameter of 6mm, 8mm, 12mm respectively, and wall thickness of 0.5mm, 0.6mm, and 0.9mm respectively. The quasi-static properties were investigated by MTSTM testing system at strain rate of 10-3 s-1, while dynamic compression properties by Split Hopkinson Pressure Bar system at strain rate of 3000±200 s-1. The results show that the values of contractile strain ratio of the tubes are between 1.34 and 1.77. The quasi-static yield strength of the tubes is above 765MPa, which is 75 ∼ 80% of that of commercial Ti-6Al-4V plates. The dynamic plasticity of the tubes is comparable to commercial Ti-6Al-4V plates, while the dynamic strength of the tubes is only 50∼60% of that of commercial Ti-6Al-4V plates.