Investigation of HPT rotor blades

Suresh Kumar, M and Venkataswamy, MA and Sujata, M and Bhaumik, SK (2006) Investigation of HPT rotor blades. Project Report. National Aerospace Laboratories, Bangalore.

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Abstract

During routine inspection, two unused HPTR blades (blade No. 2522F and 6865C) showed indications of surface defects. These blades were sent to the laboratory for analyzing the nature of defects by non-destructive methods. Stereo-binocular and scanning electron microscopic examinations revealed that both the blades have coating defects in the form of pinholes in the coating as well as defective regions devoid of coating associated with micro-cracks. The observed defects are stress concentrators and potential sites for fatigue crack initiation. Hence it is recommended that these blades be rejected.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: HPTR blades;coating defects
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
Depositing User: Mrs Manoranjitha M D
Date Deposited: 24 Aug 2011 14:44
Last Modified: 24 Aug 2011 14:44
URI: http://nal-ir.nal.res.in/id/eprint/9857

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