Effect of EDM and Femtosecond-Laser Groove-Texture Collision Frequency on Tribological Properties of 0Cr17Ni7Al Stainless Steel

Abstract

Electric spark and femtosecond-laser surface texture are very effective in antifriction systems, but there are few applications and studies in dry friction. In this study, a groove texture was prepared on the surface of 0Cr17Ni7Al stainless steel via electric spark and femtosecond laser, respectively. The tribological properties of the two groove textures under different collision frequencies with the groove were studied under the condition of dry friction. The results show that the friction coefficient of the groove texture prepared by EDM and femtosecond laser is lower than that of the untextured surface. However, this does not mean that every groove-texture design will reduce wear rate. In addition, the groove texture seems to produce different tribological properties under different preparation methods. It is found that in the friction process of the same load, time and linear velocity, different collision frequencies will affect the friction and wear properties of the surface.

Effect of Different Laser Groove Texture Collation Frequency on Tribological Properties of 0Cr17Ni7Al Stainless Steel

“…As the previous study [33] shows, with the progress of friction, the untextured surface is difficult or takes a longer time to enter stable wear. Regardless of the friction radius of the untextured surface, the friction increases with the friction time.…”

“…The specific experimental parameters are listed in Table 4. The white-light interferometer was used to detect the cross-sectional profile of the wear mark; the wear area was calculated by integrating the cross-sectional profile; the wear volume was obtained by multiplying the friction step and wear area [33]: Two different test pieces were prepared and compared during the experiment: nanosecond-laser surface-texture and picosecond-laser surface-texture. Before the test of each sample, acetone was used for further ultrasonic cleaning for 5 min to wipe the surface of the test piece.…”

“…The specific experimental parameters are listed in Table 4. The white-light interferometer was used to detect the cross-sectional profile of the wear mark; the wear area was calculated by integrating the cross-sectional profile; the wear volume was obtained by multiplying the friction step and wear area [33]:…”

“…After the friction experiment, the flaked convex part on the surface of the friction pair is called the hard-phase peak [33]. The hard-phase peak may be caused by the migration of wear debris under the combined action of load and sliding speed during the friction process.…”

Contact and Tribological Study of Micro/Nano Groove Texture on the Surface of Gas Bearing Materials Based on Nanoscale

“…Surface texture is widely used in the hydrophobic [ 18 , 19 ], antifriction [ 20 , 21 , 22 ], friction-increasing [ 23 ] and wear-resistant [ 24 , 25 ] fields. At present, there are many methods to prepare surface texture, mainly micro/nano-scale processing, but including ultrasonic processing technology, ion etching [ 26 , 27 ], electrochemical processing technology [ 28 , 29 ], chemical etching [ 30 , 31 , 32 ], laser processing [ 33 , 34 , 35 , 36 ] and micromachining technology [ 37 , 38 ].…”