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Journal of Failure Analysis and Prevention

, Volume 14, Issue 4, pp 450–453 | Cite as

Failure Investigation of Condensate Pump Shaft

  • D. Ghosh
  • H. Roy
  • A. Mondal
Case History---Peer-Reviewed

Abstract

The premature failure of condensate pump shaft was investigated in this paper. The shaft was attached with feed water condensate pump system in thermal power plant boiler. The shaft was fabricated from martensitic stainless steel. A detailed study was carried out to determine the root cause of the shaft failures. Visual examination, macroanalysis, chemical analysis, microstructural characterization, and fractography examinations were also carried out to ascertain the probable cause of shaft failure. Finally, it was concluded that the failure of the shaft was due to the torsional fatigue initiated by the cracks at the thread roots.

Keywords

Crack Failure analysis Fatigue failure Fracture Martensitic stainless steel Shaft 

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Copyright information

© ASM International 2014

Authors and Affiliations

  1. 1.NDT & Metallurgy GroupCentral Mechanical Engineering Research Institute (CMERI)DurgapurIndia
  2. 2.Central Research FacilityCentral Mechanical Engineering Research Institute (CMERI)DurgapurIndia

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