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Corrosion fatigue crack propagation in metalsThis review assesses fracture mechanics data and mechanistic models for corrosion fatigue crack propagation in structural alloys exposed to ambient temperature gases and electrolytes. Extensive stress intensity-crack growth rate data exist for ferrous, aluminum and nickel based alloys in a variety of environments. Interactive variables (viz., stress intensity range, mean stress, alloy composition and microstructure, loading frequency, temperature, gas pressure and electrode potential) strongly affect crack growth kinetics and complicate fatigue control. Mechanistic models to predict crack growth rates were formulated by coupling crack tip mechanics with occluded crack chemistry, and from both the hydrogen embrittlement and anodic dissolution/film rupture perspectives. Research is required to better define: (1) environmental effects near threshold and on crack closure; (2) damage tolerant life prediction codes and the validity of similitude; (3) the behavior of microcrack; (4) probes and improved models of crack tip damage; and (5) the cracking performance of advanced alloys and composites.
Document ID
19900015089
Document Type
Conference Paper
Authors
Gangloff, Richard P. (Virginia Univ. Charlottesville, VA, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1990
Subject Category
METALLIC MATERIALS
Report/Patent Number
NASA-CR-4301
NAS 1.26:4301
Meeting Information
International Conference on Environment Induced Cracking of Metals(Kohler, WI)
Funding Number(s)
PROJECT: RTOP 505-63-01
CONTRACT_GRANT: NAG1-745
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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