Fatigue Failure Analysis of a Speed Reduction Shaft
| Autor: | Rodrigo da Silva Miranda, Clarissa Cruz, Adilto Pereira Andrade Cunha, Noé Cheung |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Mining engineering. Metallurgy Bainite microstructure Metals and Alloys TN1-997 Fractography 02 engineering and technology Edge (geometry) 021001 nanoscience & nanotechnology Microstructure failure analysis 020303 mechanical engineering & transports 0203 mechanical engineering Ultimate tensile strength Fracture (geology) General Materials Science fatigue Elongation Composite material 0210 nano-technology Failure mode and effects analysis fracture surface |
| Zdroj: | Metals, Vol 11, Iss 856, p 856 (2021) Metals Volume 11 Issue 6 |
| ISSN: | 2075-4701 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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