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Fatigue Performance of AAR Class B Railroad Wheel Steel at Ambient and Elevated Temperatures

[+] Author Affiliations
Peter C. McKeighan, Fraser J. McMaster

Southwest Research Institute, San Antonio, TX

Jeffrey E. Gordon

U.S. Department of Transportation, Cambridge, MA

Paper No. IMECE2002-33240, pp. 19-26; 8 pages
  • ASME 2002 International Mechanical Engineering Congress and Exposition
  • Rail Transportation
  • New Orleans, Louisiana, USA, November 17–22, 2002
  • Conference Sponsors: Rail Transportation Division
  • ISBN: 0-7918-3646-0 | eISBN: 0-7918-1691-5, 0-7918-1692-3, 0-7918-1693-1
  • Copyright © 2002 by ASME


Classical stress-life (S-N) curves were developed for AAR Class B wheel steel with specimens removed from the tread area of an as-forged railcar wheel. The specimen geometry was a standard hourglass fatigue test specimen with a low stress concentration (Kt ) of 1.05. Fatigue testing was performed at stress ratios of −1.0, 0.05, 0.5 and 0.7. Testing was performed at ambient, 500°F and 1000°F using high current resistance or convection methods. Endurance limit data was obtained for all R-ratios, although for the 1000°F condition there did not appear to be a clear endurance limit transition. These endurance limit data were used to estimate the Sines parameters, A and α.

Copyright © 2002 by ASME



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