PVD coatings influence (TiCN, BCN, and CrAlN) on the fatigue life behavior of AISI 1045 steel for automotive applications

This work evaluated the influence of titanium carbo-nitride (TiCN), chromium aluminum nitride (CrAlN), and boron (BCN) coatings deposited on AISI 1045 steel their behavior in fatigue life. Suitable deposition parameters were established to obtain appropriate times for polycrystalline growth desired stoichiometry, as well a stable layer thickness ~ 3 ?m. The physical chemical properties obtained by X-ray diffraction (XRD), photoelectron spectroscopy (XPS), nanoindentation. Scanning electron microscopy (SEM) was used analyzing fracture surfaces samples subjected fatigue. analysis uncoated coated substrates performed under rotary bending conditions applying maximum alternating stresses interval 55 70% ultimate strength value, i.e., from 479 610 MPa, respectively. test conducted at room temperature. It that resistance increased three types samples, TiCN, BCN, CrAlN, with values 9.6%, 4.2%, 3.9%, respectively, calculated 1 × 106 cycles. highest value life improvement corresponded TiCN coating. is associated increase mechanical coating, lower presence tensile type stresses. results found these ternary open up possibility future applications devices, e.g., automotive high demands service conditions.