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Technical Basis of Fatigue Crack Growth Threshold for Stainless Steel in Air Environment for ASME Code Section XI

[+] Author Affiliations
Kunio Hasegawa

Technical University of Ostrava, Ostrava-Poruba, Czech

Saburo Usami

Hitachi Ltd., Hitachi-shi, Japan

Paper No. PVP2017-66205, pp. V01AT01A009; 8 pages
doi:10.1115/PVP2017-66205
From:
  • ASME 2017 Pressure Vessels and Piping Conference
  • Volume 1A: Codes and Standards
  • Waikoloa, Hawaii, USA, July 16–20, 2017
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5790-8
  • Copyright © 2017 by ASME

abstract

The fatigue crack growth threshold is an important characteristic of crack growth assessment for the integrity of structural components. However, threshold values for austenitic stainless steels in air environment are not well provided in many fitness-for-service (FFS) codes, although extensive amount of fatigue crack growth tests data has been published. This paper focuses on fatigue crack growth threshold values for austenitic stainless steel in air environment at room and high temperatures. The paper introduces the current fatigue crack growth rates provided by the ASME (American Society of Mechanical Engineers) Code Section XI and summarizes the available test data of fatigue crack growth thresholds based on the literature survey. The paper then discusses the applicability of the existing fatigue crack growth thresholds for stainless steels and proposes a new relation as a function of the stress ratio for use by the ASME Code Section XI.

Copyright © 2017 by ASME

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