Abstract
Surface and subsurface details are presented of tin-based babbitt bearing pads which have failed due three different causes; through electrical pitting in the thrust pads, thermal fatigue in a tilting pad journal bearing, or cavitation in the thrust pads. Other associated defects in these pads are also highlighted. The microscopic details of the pits reveal the different features of electrical pitting and cavitation. Thermal fatigue produces initiation of cracks and final debonding of babbitt. It has also been found that high temperature in the mating surfaces of the bearing pads during sliding causes concentration of SbSn cuboids and Cu 6Sn 5 needles in the surface zone.
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