Strain rate effects in stress corrosion cracking

Journal Article · Thu Mar 01 04:00:00 EST 1990 · Corrosion (Houston); (USA)

DOI:https://doi.org/10.5006/1.3585089· OSTI ID:6565562

Parkins, R N ^[1]

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1. Newcastle upon Tyne Univ. (UK). Dept. of Metallurgy and Engineering Materials

Slow strain rate testing (SSRT) was initially developed as a rapid, ad hoc laboratory method for assessing the propensity for metals an environments to promote stress corrosion cracking. It is now clear, however, that there are good theoretical reasons why strain rate, as opposed to stress per se, will often be the controlling parameter in determining whether or not cracks are nucleated and, if so, are propagated. The synergistic effects of the time dependence of corrosion-related reactions and microplastic strain provide the basis for mechanistic understanding of stress corrosion cracking in high-pressure pipelines and other structures. However, while this may be readily comprehended in the context of laboratory slow strain tests, its extension to service situations may be less apparent. Laboratory work involving realistic stressing conditions, including low-frequency cyclic loading, shows that strain or creep rates give good correlation with thresholds for cracking and with crack growth kinetics.

• OSTI ID: 6565562
• Journal Information: Corrosion (Houston); (USA), Journal Name: Corrosion (Houston); (USA) Vol. 46:3; ISSN 0010-9312; ISSN CORRA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360105* -- Metals & Alloys-- Corrosion & Erosion
42 ENGINEERING
420205 -- Engineering-- Transport & Storage Facilities-- (1980-)
ALLOYS
CHEMICAL REACTIONS
CONTAINERS
CORROSION
CRACK PROPAGATION
CREEP
ENVIRONMENTAL EFFECTS
FORECASTING
HARDENING
HIGH PRESSURE
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
PARAMETRIC ANALYSIS
PIPELINES
PRESSURE VESSELS
RELIABILITY
STEELS
STRAIN HARDENING
STRESS ANALYSIS
STRESS CORROSION