|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advanced Functional and Structural Thin Films and Coatings
||Study on Surface Cracking and Interfacial Delamination of Metallic Coatings Using a Tension Test
||Deepesh Yadav, Sanjay Sampath, B N Jaya
|On-Site Speaker (Planned)
Surface cracking and interfacial delamination of metallic coatings, deposited by high-velocity oxy-fuel technique, have been investigated under tension test. Local strain distribution has been determined in the coating and substrate by digital image correlation for increasing applied global strain and, results reveal that coating and substrate show same strain until the elastic limit of the substrate is reached. As the substrate is plastically deformed interface delamination takes place in the metallic Ni and Ni-5Al coatings while both surface cracking and delamination take place in the NiCrAlY coating. Results also show no plastic deformation occurs in these metallic coatings throughout the test. Numerical simulations have been used to determine stress distribution in the coating, substrate and at the interface, to quantify the fracture strength of the coating and interfacial shear strength, based on the failure mode experimentally observed.
||Mechanical Properties, Other, Other