Affiliations: [a] Karpenko Physico-Mechanical Institute of the NASU, Lviv 79060, Ukraine | [b] Lviv Polytechnic National University, Lviv 79013, Ukraine | [c] Hetman Petro Sahaidachnyi National Army Academy, Lviv 79012, Ukraine
Abstract: The combined theoretical-experimental technique to estimate high-tempered 65Γ steel resistance to rolling contact fatigue cracking is used. As a result of complex studies, the fatigue life data of high-tempered 65Γ steel is obtained. The dimensions of spall formed by pitting mechanism for deferent contact pressure values is determined. It is shown that the significant role in rolling contact fatigue estimation of similar steels has an initiation shear crack length. The influence of tempering temperature after quenching on rolling contact fatigue resistance of 65Γ steel is evaluated.
Keywords: 65Γ steel, tempering temperature, rolling contact fatigue, spall, fatigue crack growth rate, fatigue life