Title

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

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.

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

 
COinS
 

Link to publisher version (DOI)

10.1557/JMR.2004.0339