Effect of drill bit type on delamination of graphene-reinforced carbon fiber composites along with impact, and damping properties

This paper focusses on finding the delamination, morphological, impact, and damping behavior of composites reinforced with graphene nanofillers (0, 0.25, 0.5 and 0.75 wt%). Different cutting settings and two distinct drill bits (TiAlN and CTiN) were utilized to assess the effect on the delamination properties. A scanning electron microscope was used to examine the drilled holes. The TiAlN drill bit showed a decrease in the delamination factor (Fd) for entrance and exit, from 1.038,296 to 1.021,103 and 1.069,418 to 1.006,036, respectively, as compared to 0 and 0.75 wt% graphene reinforcement. The TiAlN drill bit produced a mean thrust force of 28.76 N, while the CTiN drill bit produced a mean thrust force of 55.24 N. The composites demonstrated a 56.19% reduction in thrust force when compared to the TiAlN and CTiN drill bits. Furthermore, the impact energy of the composite increased with the addition of graphene, rising from 538.5 to 754.9 J/m, respectively. Additionally, the damping characteristics of the graphene-reinforced composites were investigated and found to have 6.4% higher values than those of the neat composites.