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Título: | Fatigue failure of a flash butt welded rail. |
Autor(es): | Godefroid, Leonardo Barbosa Faria, Geraldo Lúcio de Cândido, Luiz Cláudio Viana, Thiago Gomes |
Palavras-chave: | Rails Flash butt welding Cracking |
Data do documento: | 2014 |
Referência: | GODEFROID, L. B. et al. Fatigue failure of a flash butt welded rail. Procedia Materials Science, v. 3, p. 1896-1901, 2014. Disponível em: <http://www.sciencedirect.com/science/article/pii/S2211812814003071>. Acesso em: 09 abr. 2015. |
Resumo: | 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. |
URI: | http://www.repositorio.ufop.br/handle/123456789/5506 |
DOI: | https://doi.org/10.1016/j.mspro.2014.06.306 |
ISSN: | 2211-8128 |
Licença: | This article is published under the terms of the Creative Commons Attribution-NonCommercial-No Derivatives License (CC BY NC ND). Fonte: o próprio artigo. |
Aparece nas coleções: | DEMET - Artigos publicados em periódicos |
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ARTIGO_FatigueFailureFlash.pdf | 1,24 MB | Adobe PDF | Visualizar/Abrir |
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