Failure Analysis of a Cast Mn-Bronze Propeller |
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Authors: | George A. Pantazopoulos Anagnostis I. Toulfatzis Kyriakos A. Tzompanakis |
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Affiliation: | (1) ELKEME Hellenic Research Centre for Metals S.A., 252 Piraeus Str., 17778 Athens, Greece;(2) Tzompanakis Marine Propulsion, 4 Gravias, 18545 Piraeus, Greece |
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Abstract: | The investigation of a failure of a cast manganese bronze propeller, fractured after a short service period (~4–5 months), was conducted. Chemical analysis, visual inspection, optical microscopy, fractographic evaluation, SEM/EDS analysis, and hardness testing were used as the principal analytical tools for the failure investigation. The findings suggest that the failure occurred due to fatigue mechanism under low stress conditions. The non-conformities detected in material chemical composition, as well as the presence of internal and surface flaws could be considered as the main contributors of the premature failure of the propeller. |
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