Effects of C content on the thermal fatigue resistance of cast iron with biomimetic non-smooth surface

In order to improve thermal fatigue resistance of brake drum materials, cast iron samples with biomimetic non-smooth surface were processed by laser to imitate the alternately soft and hard structure of nacreous layer. In addition, C contents were adjusted for further investigating the effect on thermal fatigue resistance of non-smooth sample. The results indicated that biomimetic non-smooth surface had a beneficial effect on improving thermal fatigue behavior of samples with different C contents, and non-smooth sample with 3.7% C contents had the best enhanced degree of thermal fatigue resistance comparing with smooth sample which has the same C content.