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Journal of Failure Analysis and Prevention

, Volume 10, Issue 4, pp 334–340 | Cite as

Second Stage Gas Turbine Blade Premature Replacement Investigation

  • A. H. Mustafa
  • Hameed H. Badairy
  • Ihsan M. Al-Taie
Technical Article---Peer-Reviewed
  • 127 Downloads

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.

Keywords

Gas turbine blade Secondary phase precipitates, oxidation 

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Copyright information

© ASM International 2010

Authors and Affiliations

  • A. H. Mustafa
    • 1
  • Hameed H. Badairy
    • 2
  • Ihsan M. Al-Taie
    • 2
  1. 1.Mechanical Services Shops DepartmentSaudi AramcoDhahranSaudi Arabia
  2. 2.Research & Development CenterSaudi AramcoDhahranSaudi Arabia

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