Failure Analysis of Heavy Industrial Gas Turbine Engine First Stage Nozzel Guide Vane

Alaaeldin H. Mustafa

doi:10.4028/www.scientific.net/AMR.445.1047

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 445Failure Analysis of Heavy Industrial Gas Turbine...

Failure Analysis of Heavy Industrial Gas Turbine Engine First Stage Nozzel Guide Vane

Abstract:

Failure analysis investigation was conducted on 70 MW set of 1^st stage turbine nozzle guide vanes (NGVs) of heavy industrial gas turbine. The failure was investigated using the light optical microscope (LOM), X-ray diffraction analysis (XRD) and energy dispersive X-ray spectroscopy (EDS) in an environmental scanning electron microscope (ESEM). The results of the analysis indicate that the NGVs which were made of Co base superalloy FSX-414 had been operated above the recommended operating hours under different fuel types in addition to inadequate repair process in previous repair removal. The XRD analysis of the fractured areas sample shows presence ofwhich might indicate the prolonged operation at high temperature. Keywords: cobalt-base; nozzle guide vanes, gas turbine.

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Advanced Materials Research (Volume 445)

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1047-1052

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https://doi.org/10.4028/www.scientific.net/AMR.445.1047

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January 2012

Authors:

Alaaeldin H. Mustafa

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Cobalt-Base, Gas Turbine, Nozzle Guide Vanes

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