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Technical Paper

Advanced Balancing Using Laser Machining

1991-09-01
912218
The development of a pilot production, automated laser balancing system and the results of metallurgical evaluations of laser machined materials are presented in this paper. The automated laser balancing system is designed to low speed balance, small gas turbine engine components, such as AGT1500 compressors, turbines and shafts in a single load and spin-up cycle. A high power pulsed Nd:YAG laser is used to remove material from components while they rotate at speeds to 2,000 RPM for increased balance precision and efficiency. Metallurgical examinations of laser affected zones in turbine engine materials such as 17-22A(s), IN718, AM355, Waspaloy and IN713LC as well as material fatigue testing are presently being conducted to assess the effects of the laser material removal process on both material and component fatigue life. This paper, however, presents a summary of only the 17-22A(s) results.
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