Crack Closure Effects on Fatigue Crack Growth Thresholds and Remaining Life in an HSLA Steel
Author:
Todd J. A.1, Chen L.2, Yankov E. Y.3, Mostovoy S.4
Affiliation:
1. Department of Mechanical, Materials, and Aerospace Engineering, Illinois Institute of Technology, 10 West 32nd Street, E1-243, Chicago, IL 60616-3793 2. Texas Instruments, Attleboro, MA 3. A. Finkl and Sons, Chicago, IL 60616 4. Department of Mechanical, Materials, and Aerospace Engineering, Illinois Institute of Technology, Chicago, IL 60616-3793
Abstract
The effects of crack closure on the near-threshold corrosion fatigue crack growth behavior of Mil S-24645 HSLA steel and its weld metal have been investigated in air, ASTM seawater at the free corrosion potential, and ASTM seawater at −0.8V and −1.0V (SCE) using frequencies of 10, 2, and 0.2 Hz, and a stress ratio, R = 0.1. Remaining life, in the presence and absence of crack closure, has been estimatedas a function of applied stress range for a structure containing a 3-mm-deep surface semi-elliptical flaw.
Publisher
ASME International
Subject
Mechanical Engineering,Mechanics of Materials,Safety, Risk, Reliability and Quality
Reference51 articles.
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G. S.
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2 articles.
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