Stresses in a coated solid due to shear and normal boundary tractions

Abstract

Mismatch in elastic and mechanical properties of the film–substrate interface is common when engineering alloys are hard coated. Knowledge of interface stresses due to applied external tractions can be useful in evaluating propensity for coating failure as a function of material properties and for coating design. Using plane strain modeling and displacement formulation, interface stresses are calculated and presented here as a function of elastic modulus ratios. Results are also discussed from application perspectives.

Influence of cutting edge radius on the wear resistance of PM-HSS milling inserts

“…Among the huge work treating the subject, Tonshoff and Blawit [10] and Zheng and Ramalingan [13] have shown that the good adhesion of a coating is strongly determined by a low surface roughness (as in the case of the honed insert). This confirms the results obtained by Bouzakis et al [15], who has reported that carbide inserts treated by honing exhibit a better result in milling of steel than the one treated by sandblasting.…”

Adhesion and Deadhesion

“…[87] If the substrate is rigid, the more ductile the film material, then the higher is the shear component. The components of the stress will depend on the mechanical properties of the film and substrate materials.…”