Journal
ENGINEERING FAILURE ANALYSIS
Volume 80, Issue -, Pages 368-377Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfailanal.2017.07.007
Keywords
Superheater; Rupture; Overheating; Microstructural degradation
Funding
- Isfahan University of Technology
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A failure analysis investigation was carried out on the secondary Superheater tubes of a boiler unit in a steam power plant. The tubes, made of DIN-16CrMo4 steel, failed by bulging and rupture only after about three years of operation. Metallurgical investigations revealed that microstructural degradation had mainly occurred at the external (fireside) tube surface. Longterm overheating was identified as the root cause of the premature failure.
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