Failure analysis of labyrinth pins of an aeroengine

Venkataswamy, MA and Parameswara, MA and Keshab, Barai and Sujata, M and Bhaskaran, TA and Bhaumik, SK (2003) Failure analysis of labyrinth pins of an aeroengine. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

A labyrinth ring and 55 pins pertaining to an aeroengine, which completed 741:29/242:02 hrs in service were sent to the laboratory for analysis. Dye penetrant examination revealed crack like indications in 9 pins out of the 55 pins at about 4-5 mm from the pin-head. Examination of these pins under the Scanning Electron Microscope revealed a circumferential deformation/depression marks at this location. Metallographic examination showed that out of these 9 pins, one pin had a fatigue crack of length of about 450 m.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Aeroengine;labyrinth pins;deformation/depression mark
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: 01 Aug 2011 13:41
Last Modified: 01 Aug 2011 13:41
URI: http://nal-ir.nal.res.in/id/eprint/9774

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