Open Access

ARTICLE

A Numerical Study of the Fatigue Behaviour of Notched PVD-coated Ti-6Al-4V

by S. Baragetti¹, F. Tordini²

1 Università degli Studi di Bergamo, Bergamo, Italy. Email: sergio.baragetti@unibg.it
2 Università degli Studi di Ferrara, Ferrara, Italy. E-mail: federico.tordini@unibg.it

Structural Durability & Health Monitoring 2007, 3(3), 165-176. https://doi.org/10.3970/sdhm.2007.003.165

Abstract

The effect of a TiN PVD (Physical Vapor Deposition) coating on the fatigue behaviour of the titanium alloy Ti-6Al-4V was investigated. Fatigue tests were performed on coated and uncoated, both smooth and 120° V-notched, specimens in order to evaluate the influence of the coating on the substrate fatigue resistance. Numerical analyses were carried out in order to determine the stress distributions below the specimen surface and on the coating. Several coating elastic moduli were used in such calculations. The residual stress gradient induced by the coating process deposition and the substrate plasticization were also taken into account with FEM. The numerical analyses were compared to the experimental results in order to interpret them.

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Keywords

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