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Title: Fatigue failure analysis of a speed reduction shaft.
Authors: Miranda, Rodrigo da Silva
Cruz, Clarissa Barros da
Cheung, Noé
Cunha, Adilto Pereira Andrade
Keywords: Failure analysis
Fracture surface
Issue Date: 2021
Citation: MIRANDA, R. da S. et al. Fatigue failure analysis of a speed reduction shaft. Metals, v. 11, p. 856, 2021. Disponível em: <>. Acesso em: 29 abr. 2022.
Abstract: The mining industry sector is notable for the severe service loads and varied environmental conditions that it imposes on its equipment and mechanical systems. It has become essential to identify the causes of failures and use the information to avoid similar failures and improve projects. In this paper, a study on shaft failure in a speed reduction box was carried out. A section of a fractured shaft made of hardened austempered steel was analyzed to determine the cause of the break. Fractography was performed to characterize the failure mode on the fracture surface. The microstructural analysis and hardness profile revealed that the shaft was inadequately heat treated, resulting in low resistance microstructures and the development of a thin layer of bainite at the shaft edge. Large amounts of inclusions were found in the fracture region, and the tensile tests revealed that the material had an elongation below the specification. The analyses showed that the combination of factors of a large amount of inclusions present in the low resistance banded structure, and the presence of concentrated pores in that same region, acted in a synergistic way to decrease the fatigue resistance and fatigue life of the shaft material.
ISSN: 2075-4701
metadata.dc.rights.license: This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// 4.0/). Fonte: o PDF do artigo.
Appears in Collections:DEENP - Artigos publicados em periódicos

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