The article deals with the influence of the defect initial shape on the residual lifetime of a continuous casting machine roll made of 25Cr1MoV steel. Based on this approach, previously proposed by some authors, the growth of the surface fatigue crack was modeled in a roll under loading and temperature conditions that are close to operational ones, taking into account the statistical distribution of the C parameter of Paris' equation. Dependencies of the continuous casting machines roll fatigue lifetime on the initial defect shape and critical defect sizes are obtained.
Yasniy, O. P., & Lapusta, Y. (2016). Effect of the defect initial shape on the fatigue lifetime of a continuous casting machine roll. Comptes Rendus - Mecanique, 344(8), 596–602. https://doi.org/10.1016/j.crme.2016.04.002