The results of complex comparative study of micro- and mesostructure, wear debris morphology, tribological behavior and mechanism of plastic deformation in friction of steel 45 in the original and ion-implanted states were presented. An approach to the description of plastic deformation and failure in friction was applied, which involved the concept of structural levels of plastic deformation and physical mesomechanics methods. The block-on-ring CMT-1 friction machine was used for tribotests in machine oil as a lubricant at sliding velocity 1 m/sec and normal load 150 N. The gradient structure was destroyed in friction and wear particles appeared whose dimensions corresponded to three structural levels. Good correlation was found between the dimensions of the wear particles and the dimensions of the fragmented structure elements at different scale levels. The rotation mode of plastic deformation in friction caused the formation of coarse wear particles that increased the wear of non-implanted steel. The modified gradient structure similar to that appearing in friction (from the quasi-amorphous to fine states) was formed in the subsurface layer during ion implantation. The structure promoted the localization of plastic deformation induced by friction in a thin surface layer and retards the formation of the fragmented structure at the mesolevel. The localization of plastic deformation in the thin surface layer in friction hindered the rotation mode of deformation and reduced the number of coarse wear particles, thus improving the wear resistance of implanted steel.
|Number of pages||7|
|Journal||Journal of Friction and Wear|
|Publication status||Published - 2002|
ASJC Scopus subject areas
- Mechanical Engineering