High Temperature Material Processes (An International Quarterly of High-Technology Plasma Processes) An International Journal

ISSN for PRINT: 1093-3611

For Online Access

Best Paper Award Selection - Editorial Board Site

2005, Volume9

Issue 4

174 pages

DOI: 10.1615/HighTempMatProc.v9.i4

Issue price - $144.00

N. D. Pandey
Defence Metallurgical Research Laboratory, Hyderabad 500 058, India

H. S. Shan
Mechanical and Industrial Engineering Department, Indian Institute of Technology, Roorkee 247 667, India

T. Mohandas
Defence Metallurgical Research Laboratory, Hyderabad 500 058, India

Increasing competition in the area of manufacturing demands that processes are cost efficient without compromising on product quality. Percussion laser drilling is a process being increasingly used by aerospace manufacturers for producing cooling holes in turbine components. Shape, precision and functional characteristics of the laser drilled holes have been individually considered in the past for determining the hole quality. In this paper, a concept of integrated hole quality in terms of its cooling efficiency has been developed. In turn, it is based on the shape and precision characteristics of the holes. Based on it, quality of holes produced in a nickel base superalloy 'SUPERNI 263A' at different laser pulse peak powers has been computed and presented. It has been found that integrated quality of the laser drilled holes for such applications is 56 − 88 % better than the straight walled holes. Use of higher pulse peak power is seen to slightly decrease the integrated quality of the holes.

DOI: 10.1615/HighTempMatProc.v9.i4.120 Download article, 625-653 pages

Article price - $35.00

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