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Second Stage Gas Turbine Blade Premature Replacement Investigation

  • Technical Article---Peer-Reviewed
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Abstract

This article investigates the root causes of the premature failure and replacement of a set of second-stage turbine blades from a heavy industrial gas turbine engine. The investigations included dye-penetrant testing, optical microscopy, X-ray diffractometry (XRD), Environmental Scanning Electron Microscopy (ESEM), and energy dispersive X-ray spectroscopy (EDS) techniques. Moreover, the effect of heat treatment process on restoring the blade microstructure so that the properties were suitable for service was also explored. As a result of the investigation, the second-stage turbine blades premature failure was attributed to the grain boundary secondary phase precipitates. These precipitates were present in the “as-found” condition of the investigated blades.

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Authors and Affiliations

  1. Mechanical Services Shops Department, Saudi Aramco, Dhahran, Saudi Arabia

    A. H. Mustafa

  2. Research & Development Center, Saudi Aramco, Dhahran, Saudi Arabia

    Hameed H. Badairy & Ihsan M. Al-Taie

Authors
  1. A. H. Mustafa
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  2. Hameed H. Badairy
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  3. Ihsan M. Al-Taie
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Correspondence to A. H. Mustafa.

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Mustafa, A.H., Badairy, H.H. & Al-Taie, I.M. Second Stage Gas Turbine Blade Premature Replacement Investigation. J Fail. Anal. and Preven. 10, 334–340 (2010). https://doi.org/10.1007/s11668-010-9363-6

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  • DOI: https://doi.org/10.1007/s11668-010-9363-6

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