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

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.

Peer review status:UNDER REVIEW

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