Failure analysis of I stage compressor rotor blades of an aeroengine

Sujata, M and Madan, M and Venkataswamy, MA and Raghavendra, K and Bhaumik, SK (2011) Failure analysis of I stage compressor rotor blades of an aeroengine. Project Report. National Aerospace Laboratories, Bangalore, India.

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Abstract

Three I stage compressor rotor blades belonging to an aeroengine were forwarded to the laboratory for investigation. In all these discs, some blades were found bent during operation. Examination revealed that the blades got deformed locally at the leading edge close to the blade tip. Gross deformation pattern suggested that there was foreign object damage (FOD) wherein the foreign object impacted on the concave surfaces of the blades. A few damaged blades from one of the discs (Sl No. CD 1025) were removed for microscopic study. Examination showed presence of shallow and faint grazing marks of the foreign object on the concave surface of the blade at the damaged regions. The material of the foreign object could not be identified since no residue of the same was found left on the blades. However, from the nature of the damage and the grazing marks, it appeared that the damage to the blades was caused most probably by soft objects. No metallurgical abnormalities were found responsible for the bending of the blades.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: Aeroengine;I stage compressor;FOD;Soft object
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
Depositing User: Ms. Alphones Mary
Date Deposited: 12 Jul 2011 14:45
Last Modified: 12 Jul 2011 14:45
URI: http://nal-ir.nal.res.in/id/eprint/9352

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