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Title: Fatigue failure of a flash butt welded rail.
Authors: Godefroid, Leonardo Barbosa
Faria, Geraldo Lúcio de
Cândido, Luiz Cláudio
Viana, Thiago Gomes
Keywords: Rails
Flash butt welding
Issue Date: 2014
Citation: GODEFROID, L. B. et al. Fatigue failure of a flash butt welded rail. Procedia Materials Science, v. 3, p. 1896-1901, 2014. Disponível em: <>. Acesso em: 09 abr. 2015.
Abstract: Medium carbon steel rails are commonly jointed by means of a flash butt welding procedure. To ensure an adequate service life for the structural component commonly subjected to fatigue loading, a rigorous quality control should be performed, both in welding parameters and in the surface quality of the welded joint. This work investigated the cause of a recurrent failure in a railway, with cracking always initiated in the rail in the region of the welded joint. All standard procedures of failure analysis were applied, with a careful assessment of the material characteristics and the fractured surface. It was concluded that fatigue cracks initiated near the weld bead and spread in a brittle mode, leading to premature fracture of the material. An in-depth analysis of the early cracks showed that the surface finishing of the weld bead was not appropriate, generating undesirable stress concentration. A recommendation to change the procedure of surface finishing of welded joint was held, aiming to decrease the number of accidents on the railway line.
ISSN: 2211-8128
metadata.dc.rights.license: This article is published under the terms of the Creative Commons Attribution-NonCommercial-No Derivatives License (CC BY NC ND). Fonte: o próprio artigo.
Appears in Collections:DEMET - Artigos publicados em periódicos

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