ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Nature of contact deformation of TiN films on steel

Bhowmick, S and Xie, ZH and Hoffman, M and Jayaram, V and Biswas, SK (2004) Nature of contact deformation of TiN films on steel. In: Journal Of Materials Research, 19 (9). pp. 2616-2624.


Download (286kB)


Nanoindentation experiments were carried out on a columnar similar to1.5-mum-thick TiN film on steel using a conical indenter with a 5-mum 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.

Item Type: Journal Article
Publication: Journal Of Materials Research
Publisher: Materials Research Society
Additional Information: Copyright for this article belongs to Materials Research Society
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 09 Nov 2004
Last Modified: 19 Sep 2010 04:17
URI: http://eprints.iisc.ac.in/id/eprint/2290

Actions (login required)

View Item View Item