关键词: 冲击接触力, 管变形, 能量吸收率, 微动磨损, 低能量冲击

Abstract:

：The micro-amplitude impact wear tests of four types of common thin-walled tube materials(stainless steel, brass alloy, pure titanium and aluminum alloy)are conducted under a low-energy impact fretting wear tester .The impact dynamics behavior and damage behavior of the tubes is inspect during the impact fretting wear progress. The results show that there are significant difference of different materials tube in terms of energy absorption rate, contact force and tube deformation. For the same material, with the initial kinetic impact energy increased, the impact contact force, tube deformation displacement and impact absorption energy also increased. Through analyzing the morphologies and profiles of the wear scars, it indicates that impact wear resistance is related to impact dynamics behavior and properties of the test materials. With the increase of kinetic impact energy, the damage became servers, and the damage mechanism of thin-wall tube is fatigue wear.

Key words: energy absorption rate, fretting wear, impact force, tube deformation, low-energy impact