Abstract The deformation mechanisms that dictate the tribological performances of heat treated Ni55Ti45, Ni54Ti45Hf1 and Ni56Ti36Hf8 alloys are revealed through rolling contact fatigue (RCF) testing transmission electron microscopy (TEM) analyses. Analysis worn samples passed a 5×108 cycle RCF runout condition shows damage is primarily confined to bands propagate several hundred nanometers – mi...

The aim of this work is to characterize the rolling and rolling-sliding contact fatigue failure mechanisms on 32CrMoV13 nitrided steel. During tests (RCF), two general features were observed: specimens presenting short lives rough sharpened spalling damage long only microspalling marks. It was possible determine a limit 3 GPa. (RSCF), clearly different behaviour between in has been driver shows...

Abstract Rolling contact fatigue tests were performed on specimens containing spheroidal inclusions to clarify the effect of orientation inclusions, and results compared with those stringer‐shaped inclusions. For all types inclusion, cracks first formed rolling surface then propagated in depth direction, an internal crack parallel from deepest point vertical crack, which led flaking. The flakin...

Hydrogen diffusion during rolling contact fatigue (RCF) is considered a potential root cause or accelerator of white etching cracks (WECs) in wind turbine gearbox bearing steels. Hydrogen entry into the bearing steel during operation is thought to occur either through the contact surface itself, or through cracks that breach the contact surface, in both cases by the decomposition of lubricant t...