Failure analysis of steam turbine blade

Madan, M and Suresh Kumar, M and Venkataswamy, MA and Sujata, M and Parameswara, MA and Bhaumik, SK (2005) Failure analysis of steam turbine blade. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

The steam turbine blade has failed by fatigue. The fatigue crack had initiated at the leading edge and propagated progressively over about 80% of the blade cross section before giving rise to final overload failure. The fatigue is of high cycle – low stress type. The thickness of the blade at the leading edge was found to be less than that of the specification. This has resulted in high stress concentration at the leading edge of the blade leading to premature fatigue crack initiation. No metallurgical and/or mechanical abnormalities were responsible for the fatigue crack initiation.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Steam turbine blade;fatigue;manufacturing error
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Division/Department: Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division, Materials Science Division
Depositing User: Mrs Manoranjitha M D
Date Deposited: 05 Dec 2011 16:49
Last Modified: 05 Dec 2011 16:49
URI: http://nal-ir.nal.res.in/id/eprint/10128

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