Effect of Oxygen Content and Working on Microstructural Evolution and Mechanical Properties of Biomedical Ti-6Al-4V Alloy Wire
In present work control-temperature hot drawing was applied to prepare a kind of Ti-6Al-4V alloy wire, and severe deformation hot-rolling process refines grain size and obtains the high tensile strength. Ti6Al-4V alloy wires with diameters of 1. 0mm, 2. 0mm and 2. 5mm were prepared in the test,aiming to investigate the effect of oxygen content of the alloys and control-temperature hot drawing on microstructure and mechanical properties. The results show that oxygen content of the alloys has obvious effect on microstructure of as-rolled Ti-6Al-4V alloy. The higher oxygen content induces the more α phase,85％ of a phase with 0.19wt. ％ oxygen content. The asrolled Ti-6Al-4V alloy with dia. 8mm shows the equiaxed α grains of 2~5μm. And then 0. 5μm of ultra-fine grain is obtained by drawing to dia. 2mm. Furthermore,the higher oxygen content of the alloys and the finer diameter mean the higher strength but the lower plasticity. Ti-6Al-4V alloy wire with 2mm in diameter and oxygen 0.14wt. ％ exhibits Rm 1270MPa and A 12％. Further investigation shows that the Ti-6Al-4V alloy occurs tough fracture and cracks spread across the equiaxed o grain boundaries. The ultra-fine grains and high density of dislocation in Ti-6Al-4V alloy causes high strength.
High strength Ti-6Al-4V ultra-fine grains oxygen content control-temperature hot drawing
Yajun Fan Jimin Cao Huabin Yang Binli Luo
Northwest Institute for Non ferrous Metal Research,Xian 710076,China
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
477-480
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）