Relationship between subsurface stress and wear particle size in sliding contacts during running-in
Document Type
Article
Publication Date
7-1-2022
Abstract
The results of an experiment set using a pin-on-disk rig on samplers made of ST37 disk and bearing steel pin are reported to characterize the wear rate of the specimen, weight loss, friction coefficient behavior, and wear particle size during running-in. Using the equations of subsurface stress for spherical contact, the location and value of maximum subsurface stress in the running-in period in three dimensions is predicted. The results indicate that there exists a relation between the size of the detached particles and the location at which the maximum subsurface shear stress occurs. Based on wear particles’ SEM images, there is a direct relationship between the size of the wear particles with the applied load, applied speed, and the initial surface roughness. It is shown that increasing the load and speed results in a rise in the friction coefficient, which affects the magnitude and location of the maximum subsurface shear stress. The latter is responsible for the nucleation and propagation of subsurface cracks.
Publication Source (Journal or Book title)
Mechanics Research Communications
Recommended Citation
Ghatrehsamani, S., Akbarzadeh, S., & Khonsari, M. (2022). Relationship between subsurface stress and wear particle size in sliding contacts during running-in. Mechanics Research Communications, 123 https://doi.org/10.1016/j.mechrescom.2022.103891