Metallurgical Characterization of a High-Pressure Rotor for Remaining Service Life Assessment After 26 Years of Service

[+] Author and Article Information
N. S. Cheruvu

Westinghouse Electric Corporation, Orlando, FL 32826

L. R. Malmfeldt

Pacific Gas and Electric Co., San Francisco, CA 94106

J. Eng. Gas Turbines Power 112(4), 543-549 (Oct 01, 1990) (7 pages) doi:10.1115/1.2906202 History: Received August 01, 1988; Revised October 16, 1989; Online April 24, 2008


In-service material degradation of a high-pressure rotor steel has been investigated for remaining service life assessment. The samples for this study were taken from the cold and hot locations of a rotor that had operated for approximately 167,500 hours. The test results have indicated that the rotor steel is slightly softened and temper embrittled as a result of service exposure. Based on isostress creep rupture data of the rotor steel in the service-exposure. Based on isostress creep rupture data of the rotor steel in the service-exposed condition, it is concluded that crack initiation due to creep is not a concern in the near future. Considering the uncertainties associated with the extrapolation of short-time rupture data on remaining service life assessment, the rotor material should be re-evaluated for degradation of properties after the next 10 years of operation.

Copyright © 1990 by The American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.





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 Journal Articles
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