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:
Chemical and structure analysis / Deposit analysis / Fracture analysis / Screws
Source:
Journal of the Balkan Tribological Association, 2018, 24, 2, 291-303
Funding / projects:
cially supported by Ministry of Education, Science and Technological Development of Serbia, Messer Tehnogas and PD TE – KO Kostolac.
TY - JOUR
AU - Ristić, M.
AU - Vasović, I.
AU - Alil, Ana
AU - Obradović, J.
AU - Prokić-Cvetković, Radica
PY - 2018
UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3792
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.
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, I. and Alil, Ana 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.",
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, 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, I., Alil, Ana, 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 .
