FATIGUE AND CORROSION PHENOMENON ON FAILURE OF WATER WALL TUBE BOILER

Eka Febriyanti, Amin Suhadi, Laili Novita Sari

Abstract


Water wall tube is one of a boiler components which has a function to transform water to be vapour so that it is normally called steam generating tubes. Any failure on wall tube will affect to the whole boiler system.  The purpose of this research is to find out root cause of failure of wall tube in order to avoid similar case in the future.  Research is conducted by examining and testing the specimens on all aspects including visual, fractography, metallography, chemical analysis, hardness test and tensile test. Examination on the fracture surface by fractographic method found the evidence of fatigue fracture with the presence of beachmark. Another examination on uninstalled boiler tube shows indication of fabrication defect and trans-granular cracks which allowed corrosive agent infiltrated into the microstructure of the tube. However, the result of chemical analysis and tensile test indicated that the tubes investigated are in accordance with ASTM A 210 Grade C specifications. Therefore, the failure of the tube is not caused by wrong material selection, but through the combination of fatigue fracture and corrosion attack where initiated at fabrication defect that acted as stress raisers.

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References


Liu, S.W., dkk, “Failure Analysis of The Boiler Water Wall Tube”, Case Studies in Engineering Failure Analysis, (9) (2017), hal. 35-39

French, David N., Metallurgical Failures in Fossil Fired Boilers, Willey and Sons Inc., (1993)

Fadjiga, G., M.Sraml, “Fatigue Crack Initiation and Propagation under Cyclic Contact Loading”, Engineering Fracture Mechanics, (76) (2009), hal. 1320-1335

Cheng, W, dkk, Micromechanics Modelling of Crack Initiation under Contact Fatigue, ASME J. Tribology, (1994)

Wilby, A.J., dan D.P. Neale, Defects Introduced Into Metals during Fabrication and Service, Materials Science and Engineering Vol. III, 2013

Ahmad J., dan J.Purbolaksono, “Hydrogen Damage in A Rear Riser Water Wall Tube of A Power Plant”, Engineering Failure Analysis, (17) (2014), hal. 1239-1245

Schijve, Jaap, Chapter 16 : Corrosion Fatigue, Fatigue of Structure and Materials, 2014

Larossa, N.A., dkk, “Corrosion Fatigue : A review of Damage Tolerance Models”, International Material Reviews, 2017

D.Sangid, Michael, “The Physics of Fatigue Crack Initiation”, International Journal of Fatigue, (57) (2013), hal.58-72




DOI: https://doi.org/10.29122/mipi.v14i1.3565

DOI (PDF): https://doi.org/10.29122/mipi.v14i1.3565.g3412

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