Life Assessment of Gas Turbine Components Using Nondestructive Inspection Techniques PUBLIC ACCESS

[+] Author Affiliations
Kurt Walter

Sulzer Innotec, Winterthur, Switzerland

Wayne Greaves

Hickham Industries, La Porte, TX

Paper No. 97-GT-373, pp. V004T12A013; 4 pages
  • ASME 1997 International Gas Turbine and Aeroengine Congress and Exhibition
  • Volume 4: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award
  • Orlando, Florida, USA, June 2–5, 1997
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-7871-2
  • Copyright © 1997 by ASME


The life expectancy of gas turbine components is strongly dependant on the service conditions in which they operate. Diverse factors can reduce the life dramatically, or can extend it far beyond what was originally predicted by the Original Equipment Manufacturer. In order to examine the condition of the casing, compressor blading, stationary turbine vanes, and rotating turbine blades, nondestructive inspection has been performed more frequently as part of an overhaul. During inspections, visual examination is usually the only method used. Hot corrosion, oxidation or overaging of the blades may not be obvious during such an inspection. The most accurate method of evaluation involves the removal of the parts from the unit, complete visual and penetrant inspection, metallurgical evaluation, and destructive mechanical testing. Yet, complete disassembly only takes place if obvious problems are found. Microstructural analysis and physical testing in such situations add much to the condition assessment. Although many in-situ techniques have been in place for years, applying them to the evaluation of gas turbine components has been limited. When nondestructive inspection is done regularly, the art of evaluation and life assessment can become more scientific. The risk of failure can be reduced and the component life extended. This paper describes the procedure for preparation and examination.

Copyright © 1997 by ASME
This article is only available in the PDF format.



Interactive Graphics


Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In