Bhowmick, S. ; Jayaram, V. ; Biswas, S. K. (2005) Deconvolution of fracture properties of TiN films on steels from nanoindentation load-displacement curves Acta Materialia, 53 (8). pp. 2459-2467. ISSN 1359-6454
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Official URL: http://www.actamat.org/article/S1359-6454(05)00084...
Related URL: http://dx.doi.org/10.1016/j.actamat.2005.02.008
Abstract
A columnar TiN film under contact loading fails by shear fracture along inter-columnar boundaries. To deconvolute inter-columnar fracture strength from load-displacement curves, nanoindentation experiments were carried out on columnar ~1.4μ m thick TiN films deposited on steels of various hardness, using a Berkovich indenter. A model, which is developed based on the shear-fracture driven deformation of the coating, is applied to the load-displacement curves to obtain inter-columnar fracture strength. The correlation between the fracture strength, biaxial residual stress and substrate yield stress is outlined. The result suggests that the presence of a high compressive residual stress substantially improves the shear fracture strength of a columnar TiN film.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | TiN Films; Nanoindentation; Shear Fracture; Residual Stress |
| ID Code: | 13556 |
| Deposited On: | 12 Nov 2010 15:21 |
| Last Modified: | 04 Jun 2011 07:07 |
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