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Synergism Between Fatigue and Cyclic-Stress Corrosion-Cracking
  • Meryl Hall, Jr
Meryl Hall, Jr

Corresponding Author:hallmm44@comcast.net

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For 50 years, researchers have considered how time-dependent environmental effects can be included in cycle-dependent corrosion fatigue (CF) crack growth rate (CGR) models. Common assumptions are that cycle- and time-dependent contributions are separable, operate in parallel, are non-interacting and that total environmental CGR can be obtained by linear summation of cycle-dependent fatigue and time-dependent (SCC) CGRs. However, considered here are data and analyses that show that environmental CGRs may be greater than predicted by superposition models. A phenomenological model is developed to quantify the effect of crack-tip strain-rate due to fatigue stress-cycles on electrochemical activity at a crack tip and thereby synergistically increase crack growth rates by a cyclic-stress corrosion-cracking (C-SCC) mechanism.
21 Dec 2020Submitted to Fatigue & Fracture of Engineering Materials & Structures
22 Dec 2020Submission Checks Completed
22 Dec 2020Assigned to Editor
28 Dec 2020Reviewer(s) Assigned
10 Mar 2021Review(s) Completed, Editorial Evaluation Pending
19 Mar 2021Editorial Decision: Revise Major
14 May 20211st Revision Received
17 May 2021Submission Checks Completed
17 May 2021Assigned to Editor
19 May 2021Reviewer(s) Assigned
22 Jun 2021Review(s) Completed, Editorial Evaluation Pending
22 Jun 2021Editorial Decision: Revise Major