Rolling Contact Fatigue Fracture of Conventional Line Rail.

The behavior of plastic deformation under the running surface of various conventional line rails which differ in the accumulated service tonnage was analyzed mainly by the X-ray diffraction, considering the distribution and development of texture under the running surface of rail, the pattern of pole figure and the development of texture with an increase in the accumulated service tonnage, etc. From the analysis, the following results became clear by comparing it with the rolling contact fatigue test specimen and the Shinkansen rail.(1) The rolling contact fatigue in the conventional line is influenced by slip.The running surface of conventional line rail is subjected to larger maximum Hertz pressure than that of Shinkansen rail.(2) The development of texture well matches the increase in the accumulated service tonnage which corresponds to the number of cycles.