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

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Abstract

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.

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Acknowledgments

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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Authors and Affiliations

  1. Regional Centre for Military Airworthiness (Engines)—CEMILAC, Bangalore, Karnataka, India

    R. K. Mishra

  2. Engine Division, Hindustan Aeronautics Limited, Bangalore, India

    Thomas Johney & K. Srinivasan

  3. Foundry & Forge Division, Hindustan Aeronautics Limited, Bangalore, India

    Nandi Vaishakhi & Bhat Raghavendra

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  1. R. K. Mishra
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  2. Thomas Johney
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  3. K. Srinivasan
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  4. Nandi Vaishakhi
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  5. Bhat Raghavendra
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Correspondence to R. K. Mishra.

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Mishra, R.K., Johney, T., Srinivasan, K. et al. Failure Analysis of HP Turbine Blades in a Low Bypass Turbofan Engine. J Fail. Anal. and Preven. 13, 274–281 (2013). https://doi.org/10.1007/s11668-013-9674-5

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  • DOI: https://doi.org/10.1007/s11668-013-9674-5

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