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Validation of Blade Repair

[+] Author Affiliations
Magnus Hasselqvist, Johan Moverare

Siemens Industrial Turbomachinery AB, Finspong, Sweden

Paper No. GT2012-69814, pp. 185-190; 6 pages
doi:10.1115/GT2012-69814
From:
  • ASME Turbo Expo 2012: Turbine Technical Conference and Exposition
  • Volume 5: Manufacturing Materials and Metallurgy; Marine; Microturbines and Small Turbomachinery; Supercritical CO2 Power Cycles
  • Copenhagen, Denmark, June 11–15, 2012
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-4471-7
  • Copyright © 2012 by ASME

abstract

Methodology for repair of oxidation damaged turbine components has been developed, including development of new filler alloys which combine high oxidation resistance with useful weldability. In the first part of the validation phase, described in detail elsewhere, it was shown that there is no extensive cracking, and that the weld material has at least the same oxidation resistance as the base alloy CMSX-4.

After a brief description of this work, we proceed with a discussion on Si as alloying element. Also, we present further validation work to test OP TMF crack initiation and crack propagation resistance of the repair weld, which is seen as important since oxidation typically occur at local hot spots which also experience OP TMF loadings.

A novel test specimen has been designed and will be presented, and the notch TMF test rig which will be used is described. We hope that this work will have generic value for validation of weld repair TMF life.

Copyright © 2012 by ASME
Topics: Maintenance , Blades

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