SEDL / STP / STP801-EB / STP44814S

Corrosion-Fatigue Crack Initiation in an Iron-Caustic System

Leis, BN
Battelle Columbus Laboratories, Columbus, Ohio

Rungta, R
Battelle Columbus Laboratories, Columbus, Ohio

Mayfield, ME
Battelle Columbus Laboratories, Columbus, Ohio

Beavers, JA
Battelle Columbus Laboratories, Columbus, Ohio

Pages: 32    Published: Jan 1983

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Abstract

Trends in stress corrosion and fatigue behavior are reviewed and a postulate for a general physical model of the corrosion fatigue process is advanced. Essential features of the postulate are surface reactions and degradation, pit formation, and stress corrosion cracking (SCC), with provision for an incubation period for pitting to become effective and for SCC to develop. Data related to surface degradation, fractography, and material fatigue resistance are presented for an iron-caustic system and discussed with respect to the postulate. The results suggest that surface degradation and SCC are the essential aspects of the corrosion-fatigue process for the iron-caustic system.