A New Parameter for Characterizing Corrosion Fatigue Crack Growth

[+] Author and Article Information
T. Shoji, H. Takahashi

Department of Engineering Science, Tohoku University, Sendai, Japan

M. Suzuki

Tohoku University

T. Kondo

Division of Nuclear Fuel and Materials, Japan Atomic Energy Research Institute, Tokai, Ibaragi-ken, Japan

J. Eng. Mater. Technol 103(4), 298-304 (Oct 01, 1981) (7 pages) doi:10.1115/1.3225020 History: Received September 23, 1980; Online September 15, 2009


The role of mechanical factors, such as ΔK, R, and K̇ (loading rate), and its significance on corrosion fatigue crack growth acceleration were discussed in terms of crack tip strain rate and/or nucleation rate of fresh metal surface. A new parameter for characterizing corrosion fatigue crack growth was proposed, paying attention to rates of crack tip mechanochemical reactions, i.e., oxide film rupture rate, passivation rate, and solution renewal rate, which are influenced by the crack tip mechanical condition, microstructure of material, and environment. Hence a new parameter da/dt] air , the time base pure fatigue crack growth rate which was related closely to crack tip deformation rate, was introduced as a measure of actual crack tip strain rate. In various combinations of materials and environments, it was shown that the value of da/dt] air determines a crack growth rate in the environment, irrespective of mechanical factors such as ΔK, Kmax , R, and K̇, or frequency.

Copyright © 1981 by ASME
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