Optical microscopy as a simple method for analysis of boiler tube failure
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A severely damaged low carbon steel boiler tube was the object of this investigation. Detailed microstructural characterization was performed by optical microscopy, whereas scanning electron microscopy (SEM) was applied only in a few cases. Results show that a variety of microstructures was formed in the material of the damaged boiler tube during its exploitation. The failure of the tube is the result of very inhomogeneous overheating. The side of the boiler tube toward fire (F) was exposed to high overheating temperature, which in some locations was well above the A3 transformation temperature. The side toward boiler (BL) was subjected to lower temperatures, i.e. in the region mostly between A1 and A3 temperatures. Variations in temperatures and cooling rates, which resulted in microstructural inhomogeneity, are the main cause for the formation and multiplication of stresses leading to the rupture of the tube. © 2019, Association of Metallurgical Engineers of Serbia. All rights reserv...ed.
Keywords:
Boiler tube / Austenite / Bainite / Widmanstatten ferrite / OverheatingSource:
Metallurgical and Materials Engineering, 2019, 25, 4, 301-313Funding / projects:
- Synthesis, processing and characterization of nanostructured materials for application in the field of energy, mechanical engineering, environmental protection and biomedicine (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45012)
- Micromechanical criteria of damage and fracture (RS-MESTD-Basic Research (BR or ON)-174004)
DOI: 10.30544/461
ISSN: 2217-8961
WoS: 000507542800005
Scopus: 2-s2.0-85078522515
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VinčaTY - JOUR AU - Jovanović, Milan T. AU - Mišković, Zoran L. AU - Maksimović, Vesna AU - Cvijović-Alagić, Ivana PY - 2019 UR - https://vinar.vin.bg.ac.rs/handle/123456789/8814 AB - A severely damaged low carbon steel boiler tube was the object of this investigation. Detailed microstructural characterization was performed by optical microscopy, whereas scanning electron microscopy (SEM) was applied only in a few cases. Results show that a variety of microstructures was formed in the material of the damaged boiler tube during its exploitation. The failure of the tube is the result of very inhomogeneous overheating. The side of the boiler tube toward fire (F) was exposed to high overheating temperature, which in some locations was well above the A3 transformation temperature. The side toward boiler (BL) was subjected to lower temperatures, i.e. in the region mostly between A1 and A3 temperatures. Variations in temperatures and cooling rates, which resulted in microstructural inhomogeneity, are the main cause for the formation and multiplication of stresses leading to the rupture of the tube. © 2019, Association of Metallurgical Engineers of Serbia. All rights reserved. T2 - Metallurgical and Materials Engineering T1 - Optical microscopy as a simple method for analysis of boiler tube failure VL - 25 IS - 4 SP - 301 EP - 313 DO - 10.30544/461 ER -
@article{ author = "Jovanović, Milan T. and Mišković, Zoran L. and Maksimović, Vesna and Cvijović-Alagić, Ivana", year = "2019", abstract = "A severely damaged low carbon steel boiler tube was the object of this investigation. Detailed microstructural characterization was performed by optical microscopy, whereas scanning electron microscopy (SEM) was applied only in a few cases. Results show that a variety of microstructures was formed in the material of the damaged boiler tube during its exploitation. The failure of the tube is the result of very inhomogeneous overheating. The side of the boiler tube toward fire (F) was exposed to high overheating temperature, which in some locations was well above the A3 transformation temperature. The side toward boiler (BL) was subjected to lower temperatures, i.e. in the region mostly between A1 and A3 temperatures. Variations in temperatures and cooling rates, which resulted in microstructural inhomogeneity, are the main cause for the formation and multiplication of stresses leading to the rupture of the tube. © 2019, Association of Metallurgical Engineers of Serbia. All rights reserved.", journal = "Metallurgical and Materials Engineering", title = "Optical microscopy as a simple method for analysis of boiler tube failure", volume = "25", number = "4", pages = "301-313", doi = "10.30544/461" }
Jovanović, M. T., Mišković, Z. L., Maksimović, V.,& Cvijović-Alagić, I.. (2019). Optical microscopy as a simple method for analysis of boiler tube failure. in Metallurgical and Materials Engineering, 25(4), 301-313. https://doi.org/10.30544/461
Jovanović MT, Mišković ZL, Maksimović V, Cvijović-Alagić I. Optical microscopy as a simple method for analysis of boiler tube failure. in Metallurgical and Materials Engineering. 2019;25(4):301-313. doi:10.30544/461 .
Jovanović, Milan T., Mišković, Zoran L., Maksimović, Vesna, Cvijović-Alagić, Ivana, "Optical microscopy as a simple method for analysis of boiler tube failure" in Metallurgical and Materials Engineering, 25, no. 4 (2019):301-313, https://doi.org/10.30544/461 . .