Journal of Failure Analysis and Prevention

, Volume 17, Issue 4, pp 788–795 | Cite as

Application of Direct Metal Deposition Process for Failure Prevention of Oil Pump Gear Shaft in an Aero Engine

  • Srinivasakiran Tumuluri
  • P. Murugeshan
  • R. K. Mishra
  • V. V. Subrahmanyam
Technical Article---Peer-Reviewed


Direct metal deposition process has been adopted for repair of oil pump gear shaft of an aero engine. The process is first optimized for the specific application of oil pump gear shaft material on a specimen and then the actual part was applied with deposition. The deposition on the gear shaft is validated through stringent quality checks and functionality check of the oil pump during bench test and engine test. The successful adoption of the deposition process is able to prevent failures which would otherwise cause catastrophic failure of the aero engine. Oil pumps are now withdrawn from service at a predetermined time prior to its scheduled inspection and overhaul for application of metal deposition.


Defect analysis Wear resistance Wear 



The authors are very grateful to the General Manger, Engine Division, Hindustan Aeronautics Limited, Bangalore for his kind permission for publishing this paper. The authors also appreciate and acknowledge the Director and Scientists of Central Manufacturing Technology Institute, Bangalore, and Dr. C. K. Srinivasa, Head of Department, Ultra Precision Engineering Department, A. R. Vinod, Scientist of Additive Manufacturing Technology and M. A. Manjunath, Scientist of Nano Manufacturing Technology Center in particular for their contribution and support without which the present work would not have been completed. The authors are also very thankful to the Center for Nano and Material Sciences, Jain University and Regional Center for Military Airworthiness for their guidance and support during work.


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Copyright information

© ASM International 2017

Authors and Affiliations

  • Srinivasakiran Tumuluri
    • 1
  • P. Murugeshan
    • 1
  • R. K. Mishra
    • 2
  • V. V. Subrahmanyam
    • 3
  1. 1.Engine DivisionHindustan Aeronautics LimitedBangaloreIndia
  2. 2.Regional Center for Military AirworthinessBangaloreIndia
  3. 3.Center for Nano and Material SciencesJain UniversityBangaloreIndia

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