Cooling Ability-based Integrated Quality of Laser-drilled Holes

Authors

  • N.D. Pandey Defence Metallurgical Research Laboratoiy, Hyderabad
  • T. Mohandas Defence Metallurgical Research Laboratoiy, Hyderabad
  • H.S. Shan Indian Institute of Technology, Roorke

DOI:

https://doi.org/10.14429/dsj.56.1874

Keywords:

Hole quality, air-cooled components, percussion laser drilling, nickel base superalloy, SUPERNI 263A, Nd, YAG laser

Abstract

Research aimed at improving the end-product quality in meeting the functional needs is
imperative to sustain product development. Aerospace manufacturers are increasingly using
percussion laser drilling for producing cooling holes in turbine components made of nickel base
superalloys. Laser drilling of superalloys has been initiated at the Defence Metallurgical Research
Laboratory, Hyderabad in the last decade keeping in view its uses in Kaveri Gas Turbine Engine
programme. Considerable.work has been carried out in this direction. Laser-drilled hole's quality
issue has been addressed in the past considering separately the shape, precision, and functional
characteristics of the laser-drilled holes. In the present investigation, a newer approach for defining
hole quality has been reported which takes into account the above hole characteristics for
computing cooling ability of the holes. This approach indicates that it is feasible to produce
better integrated quality holes through laser drilling.

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Published

2006-01-01

How to Cite

Pandey, N., Mohandas, T., & Shan, H. (2006). Cooling Ability-based Integrated Quality of Laser-drilled Holes. Defence Science Journal, 56(1), 93–101. https://doi.org/10.14429/dsj.56.1874

Issue

Vol. 56 No. 1: Quality and Reliability in Aerospace Systems

Section

Special Issue Papers

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