Nature of contact deformation of TiN films on steel
Document Type
Journal Article
Publisher
Cambridge University Press
Faculty
Faculty of Computing, Health and Science
School
School of Engineering
RAS ID
8910
Abstract
Nanoindentation experiments were carried out on a columnar ∼1.5-μm-thick TiN film on steel using a conical indenter with a 5-μm tip radius. Microstructural examination of the contact zone indicates that after initial elastic deformation, the deformation mechanism of the TiN is dominated by shear fracture at inter-columnar grain boundaries of the TiN film. A simple model is proposed whereby the applied load is partitioned between a deforming TiN annulus and a central expanding cavity in the steel substrate. It is possible to obtain a good fit to the experimental load–displacement curves with only one adjustable parameter, namely the inter-columnar shear fracture stress of the TiN film. The implication of results in the context of the performance of TiN films in service is also discussed.
DOI
10.1557/JMR.2004.0339
Comments
Bhowmick, S., Xie, Z. H., Hoffman, M., Jayaram, V., & Biswas, S. K. (2004). Nature of contact deformation of TiN films on steel. Journal of materials research, 19(9), 2616-2624.