Study on the Correlation Between Dynamical Behavior and Friction/Wear Mechanism Under the Effect of Grooves
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In this work, the interfacial friction and wear and vibration characteristics are studied by sliding a chromium bearing steel ball (AISI 52100) over both multi-grooved and single-grooved forged steel disks (20CrMnMo) at low and high rotating speeds in order to reveal the effect mechanism of groove-textured surface on tribological behaviors. The results show that the grooves modify the contact state of the ball and the disk at the contact interface. This consequently causes variations in the normal displacement, normal force, and friction force signals. The changes in these three signals become more pronounced with increasing groove width at a low speed. The collision behavior between the ball and the groove increase the amplitude of vibration acceleration at a high speed. The test results suggest that grooves with appropriate widths could trap wear debris on the ball surface while avoiding a strong collision between the disk and the ball, resulting in an improvement in the wear states.
Keywordscontact states groove textured surface tribological behaviors wear debris
The authors would like to thank Professor H. Ouyang, University of Liverpool, and Professor G.X. Chen, Southwest Jiaotong University, for helpful discussions. The authors are grateful for the financial support of the National Natural Science Foundation of China (Nos. 51675448 and 51375408) and the National Key Research and Development Program of China (2016YFB1102600).
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