The axle box bearing is a crucial component of high-speed electric multiple units (EMU) and exposed to harsh working conditions, making it susceptible subsurface-induced rolling contact fatigue (RCF) under long-term alternating stress. objective this paper develop damage-coupled elastic–plastic constitutive model that can accurately predict the RCF life EMU bearings made from AISI 52100 steel. ...

lapping is one of the most important polishing processes which can be used to fabricate flat and smooth surfaces. in this paper, the effect of lapping characteristics and mesh number of abrasive particles are studied on the surface roughness and flatness for the machining of hardened aisi 52100 rings. the most significant lapping characteristics are pressure, lap plate speed and time. scanning ...

Abstract This paper examines the influence of steel surface composition on antiwear tribofilm formation by ion-implanting typical alloying elements, Ni, Mo, Cr, V and W, into AISI 52100 bearing surfaces. Such implantation changes chemical but has relatively little effect its mechanical properties or topography. The behaviour zinc dialkyldithiophosphate (ZDDP) additive was studied. study employs...

The microstructural evolution of and simultaneous dimensional changes in high-carbon SAE 52100 bearing steel were monitored continuously during austempering for 120 min at selected temperatures the range 210 °C-270 °C, also its subsequent tempering to 340 °C an additional min, via high-energy X-ray diffraction real time in-situ dilatometry. austenite-to-bainitic ferrite transformation induces l...