摘要
采用自制球面接触冲击磨损试验机研究了ZM5镁合金在冲击载荷下的磨损行为。结果表明在本试验条件下,磨损体积损失随冲击次数的增加呈非线性增大;在低循环次数下,冲击磨损损伤形式主要为塑性变形及塑性堆积;当循环次数较高时,冲击坑中心由于塑性耗竭而出现表面压碎及剥层磨损,且由激光显微镜测得的剥层厚度在0.7μm左右;材料剥层后,随着循环次数的增加,出现二次剥落损伤。
Impact wear mechanism of ZM5 magnesium alloys was studied using a specially designed ball-on-flat impact tester. Results show that, under this test condition, the wear volume and the projected area of impact wear scar non-linearly increase with the impact cycles. Under low impact cycles, the forms of damage are mainly plastic deformation and plastic accumulation;but for high impact cycles, surface crush and delamination occurs because of the plastic exhaustion of the central zone of impact wear scar,and the thickness of the delamination measured by LCSM is about 0. 7 μm. After delamination, the second spalling phenomena were observed with the impact cycles.
出处
《润滑与密封》
CAS
CSCD
北大核心
2007年第5期94-97,101,共5页
Lubrication Engineering
基金
国家自然科学基金资助项目(50521503).
关键词
冲击磨损
镁合金
塑性变形
剥层
impact wear
magnesium alloy
plastic deformation
delamination
