With the mounting application of carburized or case-hardening gears and higher
requirements of heavy-load, high-speed in mechanical systems such as wind turbines …

Acoustic emission (AE) techniques play a key role in machine condition monitoring and
wear/fault diagnosis. Understanding the impact of friction and wear on the generation of AE …

The paper investigates the running-in of hardened steel surfaces under mixed lubrication
conditions. Pairs of surfaces of both equal and differing hardness were loaded together …

To elucidate the micropitting mechanism, ground gears were tested using FZG test rig and
the evolution of surface characteristics were followed closely from the initial 200 cycles to …

This paper presents a novel approach to predict the effect of surface roughness on surface
damage in rolling contacts. Rolling contact fatigue (RCF) tests were conducted on AISI 4130 …

A numerical contact fatigue model combining the effects of rolling contact fatigue and wear
has been developed based on mixed elastohydrodynamic lubrication (EHL) theory …

The objective of this study was to investigate the effect of retained austenite (RA) on the
micropitting behavior of carburized AISI 8620 steel under boundary lubrication condition …

Contact fatigue is a key feature limiting the service lives and reliabilities of gears. The gear
contact fatigue failure mechanism has not been understood fundamentally due to the …

Micropitting is a form of surface fatigue damage that happens at the surface roughness scale
in lubricated contacts in commonly used machine elements, such as gears and bearings. It …

Surface initiated rolling contact fatigue (RCF) of gears and rolling bearings can lead to
premature failure in mechanical transmission systems. The orientation of surface crack …