Failure analysis of LH top root fitting of an aircraft

Madan, M and Sujata, M and Raghavendra, K and Bhaumik, SK (2011) Failure analysis of LH top root fitting of an aircraft. Project Report. National Aerospace Laboratories, Bangalore, India.

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Abstract

Evidences suggest that the LH top root fitting of the aircraft has failed by stress corrosion cracking (SCC). Laboratory study showed that SCC was promoted due to poor machining at the fillet region of the component. The stress concentrators and the residual stresses resulting from this poor machining were responsible for the SCC. The situation was further aggravated due to destruction of the surface protective layer at some point of time in the service life of the component. The material of construction was found to conform to specification in terms of composition, microstructure and hardness. No metallurgical abnormalities were found responsible for the failure. A detailed analysis of the failure is presented in this report.

Item Type: Proj.Doc/Technical Report (Project Report)
Uncontrolled Keywords: LH top root fitting;Stress corrosion cracking (SCC)
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: Ms. Alphones Mary
Date Deposited: 08 Jul 2011 13:44
Last Modified: 08 Jul 2011 13:44
URI: http://nal-ir.nal.res.in/id/eprint/9293

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