Metallurgical Transactions A

, Volume 20, Issue 4, pp 741–749 | Cite as

Near-threshold fatigue crack growth properties at elevated temperature for 1Cr-1Mo-0.25V steel and 12Cr stainless steel

  • Saburo Matsuoka
  • Etsuo Takeuchi
  • Satoshi Nishijima
  • Arthur J. McEvily
Mechanical Behavior
Received:

Abstract

Near-threshold fatigue crack growth properties were investigated for a low-alloy steel 1Cr-1Mo-0.25V and a stainless steel SUS403 (13Cr) in the temperature range from 25 to 550°C. Fatigue tests were conducted at frequencies of 0.5, 5, and 50 Hz, in a manner designed to avoid crack closure. The effective value of threshold stress intensity range increased with increasing temperature and with decreasing frequency for the Cr−Mo−V steel, whereas the effective threshold stress intensity range was independent of temperature and frequency in the case of the SUS403 steel. At a given ΔK value, the fatigue crack growth rates accelerated with increasing temperature and with decreasing frequency for the Cr−Mo−V steel. However, although the rate of fatigue crack growth was independent of frequency at a given temperature for the SUS403 steel, the rate did increase with temperature. The observed threshold levels and crack growth behavior were closely related to the oxidation process of the bare surface formed at the crack tip during each load cycle.

Keywords

Metallurgical Transaction Crack Growth Rate Fatigue Crack Growth Auger Electron Spectroscopy Oxide Thickness 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© The Metallurgical of Society of AIME 1989

Authors and Affiliations

  • Saburo Matsuoka
    • 1
  • Etsuo Takeuchi
    • 1
  • Satoshi Nishijima
    • 1
  • Arthur J. McEvily
    • 2
  1. 1.Fatigue Testing DivisionNational Research Institute for MetalsTokyoJapan
  2. 2.Department of Metallurgy and Institute of Materials ScienceUniversity of ConnecticutStorrs

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