Investigation on influence of WC-Ni addition on rolling contact fatigue behavior of plasma sprayed Ni-based alloy coating

this paper investigated on influence of WC-Ni addition on rolling contact fatigue (RCF) behavior of NiCrBSi coating. The results showed that WC-Ni addition significantly influenced on failure mode of NiCrBSi coating especially under low stress, whereas both coatings failed in identical mode under relatively high stress. WC-Ni addition also had a specific influence on RCF lives. RCF Lives of NiCrBSi/WC-Ni coating were longer than NiCrBSi under low stress, but they were almost same under relatively high stress. RCF life distribution of NiCrBSi/WC-Ni coating was more concentrated than NiCrBSi. Besides, there was a potential relationship between Weibull slope and failure mode.