Investigation of failed HP turbine blade of an aeroengine

Sujata, M and Madan, M and Bhaumik, SK (2008) Investigation of failed HP turbine blade of an aeroengine. Project Report. National Aerospace Laboratories, Bangalore, India.

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A failed HPTR blade of an aeroengine was forwarded to the laboratory for analyzing the cause of failure. The blade had fractured in the airfoil at about two-third height from the blade root platform. The micro-mechanism of fracture could not be identified unambiguously due to severe oxidation of the fracture surface. However, from the failure pattern and the gross fractographic features, it appears most probable that the failure was by stress-rupture. Study showed that the microstructure of the blade contained significant volume fraction of deleterious -phase. It is believed that this microstructural abnormality was responsible for promoting stress-rupture in the HPTR blade in question. A detailed analysis of the failure is presented in this report and a few recommendations suggested.

Item Type: Monograph (Project Report)
Uncontrolled Keywords: Aeroengine;HPTR blade;Ni-base superalloy;Microstructure;Sigma phase;Stress-rupture
Subjects: AERONAUTICS > Aeronautics (General)
CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Ms. Alphones Mary
Date Deposited: 21 Jul 2011 05:17
Last Modified: 21 Jul 2011 05:17

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