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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 13    No. 5    October 2003

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Dry sliding wear of Ti-6Al-4V alloy
in air and vacuum
LIU Yong(刘 勇),YANG De-zhuang(杨德庄),
HE Shi-yu(何世禹),WU Wan-liang(武万良)

Space Materials and Environment Engineering Laboratory,
Harbin Institute of Technology, Harbin 150001, China

Abstract:Differences in wear rate, morphology of the worn surface and debris, and the microstructure in subsurface of the Ti-6Al-4V alloy after wear in air and vacuum were compared. The wear rate of Ti-6Al-4V alloy in air is higher than that in vacuum in all the ranges of sliding velocities and applied loads. The wear of Ti-6Al-4V alloy in air is controlled by a combination of abrasion, oxidation and delamination with micro-cracks remaining in subsurface. Under the vacuum condition, the surface layer of Ti-6Al-4V alloy experiences a severe plastic deformation on a great scale, which results in an ultra-fine microstructure.

 

Key words: dry sliding; titanium alloy; delamination; adhesion; deformation

ISSN 1672-7029
CN 43-1423/U

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