Characterization of sliding wear in dynamically stressed material

• Published in: Wear 1993-04, Vol.162 (B), p.1081-1090
• Main Authors: Karmakar, S., Rao, U.R.K., Sethuramiah, A.
• Format: Article
• Language: English
• ISSN: 0043-1648; 1873-2577
• DOI: 10.1016/0043-1648(93)90127-8

The present work is aimed at understanding the removal process of dynamically stressed material, and relating this removal to the number of cycles of prestressing and the stresses involved in sliding. This work is a continuation of previous work reported at the 1991 Wear of Materials Conference. A mild steel specimen was subjected to a cyclic compressive stress of 100 cycle s −1 with the two load ranges of 2.5–25 N and 10–45 N. The stressing was achieved with an En31 steel ball in the presence of turbine oil. The cyclic loading was carried out by an electromagnetic excited system. The spots generated in this way were then subjected to one-pass sliding with different loads and the removal was quantified by careful measurements with a Talystep instrument. The removal was then related to the surface stresses. The experimental observation of importance is that the spots subjected to 10 4 cycles showed negligible wear, whereas spots subjected to 10 5 and 10 6 cycles showed significant wear owing to fracture during sliding. Material removal by fracture is a consequence of defect generation owing to fatigue, which in turn depends on the number of stress cycles. The relationship between the present analysis of one-pass sliding and normal sliding wear is discussed.