Failure Analysis of a Cast Mn-Bronze Propeller
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.
KeywordsFatigue Fractography Propeller Manganese bronze
The authors wish to express special thanks to Mr. A. Rikos for his assistance to the completion of the experimental work.
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