Journal of Failure Analysis and Prevention

, Volume 13, Issue 3, pp 274–281 | Cite as

Failure Analysis of HP Turbine Blades in a Low Bypass Turbofan Engine

  • R. K. Mishra
  • Thomas Johney
  • K. Srinivasan
  • Nandi Vaishakhi
  • Bhat Raghavendra
Case History—Peer-Reviewed


Failure of high pressure (HP) turbine blades in a low bypass turbofan engine is analyzed to determine its root cause. Forensic and metallurgical investigations are carried out on all the failed blades as well as the failed components of the downstream modules. Fatigue failure of one HP turbine blade at dovetail region is found to be the primary failure. This failure has caused extensive damages in high- and low-pressure turbine modules. Remedial measures are also suggested to prevent such failures.


Blade Fatigue failure Fractography Gas turbine 



The authors are very grateful to the Executive Director, Engine Division, Hindustan Aeronautics Limited; General Manager, Foundry & Forge Division, Hindustan Aeronautics Limited; and Chief Executive (Airworthiness), CEMILAC for their kind permission for publishing this article.


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Copyright information

© ASM International 2013

Authors and Affiliations

  • R. K. Mishra
    • 1
  • Thomas Johney
    • 2
  • K. Srinivasan
    • 2
  • Nandi Vaishakhi
    • 3
  • Bhat Raghavendra
    • 3
  1. 1.Regional Centre for Military Airworthiness (Engines)—CEMILACBangaloreIndia
  2. 2.Engine DivisionHindustan Aeronautics LimitedBangaloreIndia
  3. 3.Foundry & Forge DivisionHindustan Aeronautics LimitedBangaloreIndia

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