Rolling contact fatigue of three pearlitic rail steels
作者： J.H. Beynon , J.E. Garnham , K.J. Sawley
DOI: 10.1016/0043-1648(95)06776-0
关键词: Metallurgy 、 Contact pressure 、 Contact mechanics 、 Spall 、 Materials science 、 Eutectic system 、 Crack initiation 、 Rolling contact fatigue 、 Metallography
摘要: Abstract The effects of varying contact pressure and creepage on the early stages rolling fatigue in three pearlitic rail steels have been investigated laboratory under water lubricated conditions. In test machine used, a non-contacting eddy current probe detected very small cracks was used to stop tests before spalling could destroy initiation sites order that metallography crack be undertaken. Crack morphologies similar those found wheel-rail observed. Except at highest creepages stress there little evidence manganese sulphide inclusions contributed initiation. contrast, hard oxide did contribute head-hardened grade eutectoid steel had best resistance fatigue. naturally next best, whilst lowest strength gave worst performance. networks were formed specimens tested nominal stresses 1200 MPa 1500 MPa. Isolated produced 1800
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