Accelerated Fatigue Life Testing of Nicr-Cr₃C₂ Coating at Different Loads under Rolling Contact Condition

Abstract

The aim of this paper is to address the accelerated fatigue life under rolling contact condition of coatings. The NiCr-Cr3C2ceramic-metal and Ni-Al alloy were deposited on steel substrate as topcoating and undercoating using supersonic plasma spraying technique, respectively. Accelerated fatigue life tests were conducted using a ball-on-disc tester. The life of coatings was evaluated by Weibull distribution plots and the accelerated fatigue life model was established. The results showed that the coupling relationship between the load and failure life of coatings could be obtained using this model. Accelerated life test for fatigue of coatings could improve the experimental efficiency.