Experimental Research on Crack Propagation in U71Mn and U75V Rail Steels
In this paper, the continuous in-situ observations of the fatigue crack growth in U71Mn and U75V rail steel are made by using the scanning electronic microscope (SEM). The microstructure patterns of cracks under the mode I fatigue loads and quasi-static loads are presented. The results indicate that the short fatigue crack growth in rail steel is a quasi-cleavage fracture. The ductility and the performance of fatigue resistance of U71Mn rail steel are better than those of U75V rail steel.
M.H. Aliabadi, Qingfen Li, Li Li and F.-G. Buchholz
J. J. Li et al., "Experimental Research on Crack Propagation in U71Mn and U75V Rail Steels", Key Engineering Materials, Vols. 324-325, pp. 807-810, 2006