Failure analysis of carbon steel screws under the service in the presence of corrosion environment
Abstract
The aim of this paper was to determine the causes of screws failures in compressor valves, obtained from petroleum industry. The analysed screws were in exploitation and deposition coated. Before the fracture analysis, control calculation of screws is done in order to determine, if the screws are properly dimensioned. After visual and radiographic examination, their chemical composition and structure were analysed. Detail fractography was performed on fractured surfaces to try to obtain an impression about screws failure mechanism. Qualitative analysis of deposit was employed in order to confirm if there was any possible influence of surroundings during their failure in terms of corrosion-assisted cracking. The macrofractography of originally broken surfaces shows a rough and complex topography of fracture surfaces indicating to a possibility that screws failure has been a result of complex loading conditions. Presence of sulfur containing particles on the fracture surfaces of broken s...crews and in deposit reveals a possibility that failure was environmentally-assisted.
Keywords:
Screws / Fracture analysis / Deposit analysis / Chemical and structure analysisSource:
Journal of the Balkan Tribological Association, 2018, 24, 2, 291-303Publisher:
- Scibulcom Ltd.
Funding / projects:
- cially supported by Ministry of Education, Science and Technological Development of Serbia, Messer Tehnogas and PD TE – KO Kostolac.
Collections
Institution/Community
Mašinski fakultetTY - JOUR AU - Ristić, M. AU - Vasović, Ivana AU - Alil, A. AU - Obradović, J. AU - Prokić-Cvetković, Radica PY - 2018 UR - https://machinery.mas.bg.ac.rs/handle/123456789/2966 AB - The aim of this paper was to determine the causes of screws failures in compressor valves, obtained from petroleum industry. The analysed screws were in exploitation and deposition coated. Before the fracture analysis, control calculation of screws is done in order to determine, if the screws are properly dimensioned. After visual and radiographic examination, their chemical composition and structure were analysed. Detail fractography was performed on fractured surfaces to try to obtain an impression about screws failure mechanism. Qualitative analysis of deposit was employed in order to confirm if there was any possible influence of surroundings during their failure in terms of corrosion-assisted cracking. The macrofractography of originally broken surfaces shows a rough and complex topography of fracture surfaces indicating to a possibility that screws failure has been a result of complex loading conditions. Presence of sulfur containing particles on the fracture surfaces of broken screws and in deposit reveals a possibility that failure was environmentally-assisted. PB - Scibulcom Ltd. T2 - Journal of the Balkan Tribological Association T1 - Failure analysis of carbon steel screws under the service in the presence of corrosion environment EP - 303 IS - 2 SP - 291 VL - 24 UR - https://hdl.handle.net/21.15107/rcub_technorep_3792 ER -
@article{ author = "Ristić, M. and Vasović, Ivana and Alil, A. and Obradović, J. and Prokić-Cvetković, Radica", year = "2018", abstract = "The aim of this paper was to determine the causes of screws failures in compressor valves, obtained from petroleum industry. The analysed screws were in exploitation and deposition coated. Before the fracture analysis, control calculation of screws is done in order to determine, if the screws are properly dimensioned. After visual and radiographic examination, their chemical composition and structure were analysed. Detail fractography was performed on fractured surfaces to try to obtain an impression about screws failure mechanism. Qualitative analysis of deposit was employed in order to confirm if there was any possible influence of surroundings during their failure in terms of corrosion-assisted cracking. The macrofractography of originally broken surfaces shows a rough and complex topography of fracture surfaces indicating to a possibility that screws failure has been a result of complex loading conditions. Presence of sulfur containing particles on the fracture surfaces of broken screws and in deposit reveals a possibility that failure was environmentally-assisted.", publisher = "Scibulcom Ltd.", journal = "Journal of the Balkan Tribological Association", title = "Failure analysis of carbon steel screws under the service in the presence of corrosion environment", pages = "303-291", number = "2", volume = "24", url = "https://hdl.handle.net/21.15107/rcub_technorep_3792" }
Ristić, M., Vasović, I., Alil, A., Obradović, J.,& Prokić-Cvetković, R.. (2018). Failure analysis of carbon steel screws under the service in the presence of corrosion environment. in Journal of the Balkan Tribological Association Scibulcom Ltd.., 24(2), 291-303. https://hdl.handle.net/21.15107/rcub_technorep_3792
Ristić M, Vasović I, Alil A, Obradović J, Prokić-Cvetković R. Failure analysis of carbon steel screws under the service in the presence of corrosion environment. in Journal of the Balkan Tribological Association. 2018;24(2):291-303. https://hdl.handle.net/21.15107/rcub_technorep_3792 .
Ristić, M., Vasović, Ivana, Alil, A., Obradović, J., Prokić-Cvetković, Radica, "Failure analysis of carbon steel screws under the service in the presence of corrosion environment" in Journal of the Balkan Tribological Association, 24, no. 2 (2018):291-303, https://hdl.handle.net/21.15107/rcub_technorep_3792 .