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<p>The present work investigates the failure of propeller shaft that failed in bi-directional fatigue testing at 30% of its passing criteria. Detailed failure analysis was carried out involving visual inspection, chemical analysis, microstructural analysis, fractography, SEM, and EDS analysis. The analysis concluded that fracture initiated at the tube seam weld. Localized distinctive golden patch was observed at the seam from which fracture originated. Analysis revealed decarburization, grain coarsening, and presence of oxides at the initiation.</p>

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Failure of Propeller Shaft Due to Seam Defects

  • 期刊论文

  • 发表日期：

    2025年11月17日

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  • Sanjay Maity,
  • Pavankumar Sondar

摘要

The present work investigates the failure of propeller shaft that failed in bi-directional fatigue testing at 30% of its passing criteria. Detailed failure analysis was carried out involving visual inspection, chemical analysis, microstructural analysis, fractography, SEM, and EDS analysis. The analysis concluded that fracture initiated at the tube seam weld. Localized distinctive golden patch was observed at the seam from which fracture originated. Analysis revealed decarburization, grain coarsening, and presence of oxides at the initiation.