Journal of Failure Analysis and Prevention

, Volume 13, Issue 3, pp 243–248 | Cite as

Failure Analysis of a Repaired Gas Turbine Nozzle

  • M. R. Shirpay
  • H. Kazempour-Liacy


The failure analysis of a 32.5 MW first-stage gas turbine nozzle made of cobalt-base X45 superalloy is presented. It was found that nozzle airfoil failed as a result of exposure to high temperatures. The overheating experienced by the airfoil damaged the impingement cooling system and degraded the microstructure. Also, processing during repair played an important role in the failure of the nozzle.


Failure analysis Gas turbine nozzle Overheating X45 superalloy 


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Copyright information

© ASM International 2013

Authors and Affiliations

  1. 1.Metallurgy DepartmentNiroo Research Institute (NRI)TehranIran

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