Very high cycle fatigue of high carbon chromium bearing steel at high compressive mean stresses
M. Fitzka, M. Moalla, H. Mayer
Abstract
Very high cycle fatigue (VHCF) of high carbon chromium bearing steel 100Cr6 (SAE 52100; JIS SUJ2) is investigated with ultrasonic fatigue testing for compressive mean stresses with minimum stresses σmin at compressive yield stress σCY, for σmin = 0.59σCY, and for load ratio R = −1. Fatigue limits are found for σmin = σCY and for σmin = 0.59σCY, whereas no fatigue limit below 109 cycles exists at R = −1. Cracks leading to VHCF failures exclusively start at interior inclusions. Considering inclusions as cracks, the maximum stress intensity factor of a load cycle being below the effective threshold stress intensity factor determines the fatigue limit.
Topics & Concepts
Materials scienceFatigue limitChromiumHigh carbonFatigue testingMetallurgyCompressive strengthYield (engineering)Bearing (navigation)Stress (linguistics)Composite materialStress intensity factorCarbon steelLoad bearingStructural engineeringFracture mechanicsEngineeringLinguisticsCartographyCorrosionGeographyPhilosophyAlloyFatigue and fracture mechanicsHigh Temperature Alloys and CreepHydrogen embrittlement and corrosion behaviors in metals