Figure 10. Stereomicroscopy showing the secondary cracks on the coating surface, closer to the fracture plane, after fatigue fracture.
Conclusion
The present study evaluates the fatigue performance of the coatings given by particles of Cr3C2 and NiCr, both in nanometric scale, micrometric scale and a combination of 50 % of both, sprayed by the HVOF technique on ASTM A516 steel substrate. The study allows the following conclusions: