Effect of residual stress on the fracture strength of columnar TiN films

Suresha, SJ and Gunda, R and Jayarama, V and Biswas, SK (2007) Effect of residual stress on the fracture strength of columnar TiN films. In: Journal of Material Research, 22 (12). pp. 3501-3506.

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Abstract

The intercolumnar fracture strength of a columnar TiN film was deconvoluted by nanoindentation load-displacement curves. The columnar boundary strength of such films strongly depends on the amount of residual stress present in the film. The residual stress of the coating was modified by plastically stretching the substrate. Indentation studies on the columnar TiN coating as a function of residual stress reveals that the column sliding stress diminishes with residual stress, suggesting that the presence of a high compressive stress substantially improves the fracture strength of a columnar TiN film. True film hardness on the other hand does not change.

Item Type:	Journal Article
Publication:	Journal of Material Research
Publisher:	Materials Research Society
Additional Information:	Copyright of this article belongs to Materials Research Society.
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	09 Jun 2008
Last Modified:	19 Sep 2010 04:45
URI:	http://eprints.iisc.ac.in/id/eprint/14229

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