An analysis of the effects of sulphur content and potential on corrosion fatigue crack growth in reactor pressure vessel steels

1996 ◽  
Vol 38 (5) ◽  
pp. 755-765 ◽  
Author(s):  
J.D. Atkinson ◽  
J. Yu ◽  
Z.-Y. Chen
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Corrosion Fatigue ◽  
Pressure Vessel ◽  
Reactor Pressure Vessel ◽  
Corrosion Fatigue Crack ◽  
Pressure Vessel Steels ◽  
Corrosion Fatigue Crack Growth ◽  
Reactor Pressure

Corrosion Fatigue Crack Growth in Reactor Pressure Vessel Steels in PWR Primary Water

1983 ◽  
Vol 105 (3) ◽  
pp. 245-254 ◽  
Author(s):  
P. M. Scott ◽  
A. E. Truswell
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Corrosion Fatigue ◽  
Pressure Vessel ◽  
Protective Oxide ◽  
Corrosion Fatigue Crack ◽  
Pressure Vessel Steels ◽  
Primary Water ◽  
Corrosion Fatigue Crack Growth

Experimental results for corrosion fatigue crack growth in several different ferritic pressure vessel steels including A533-B and A508-III exposed to simulated PWR primary water at 288°C are described. Since relatively little influence of environment was detected in low-frequency tests on these materials, in contrast with data reported from another laboratory, specimens have been exchanged and tested in each laboratory. These results are described, and possible reasons for the observed differences when each tested the same material are discussed. The environmental influence on corrosion fatigue crack growth is analyzed on the basis of a model of a sequence of protective oxide rupture/repassivation events during fatigue cycling. The repassivation kinetics and the controlling electrochemical factors are judged to be of crucial significance in determining the extent of environmental enhancement of fatigue crack growth.

Corrosion-Fatigue Crack Growth in Age-Hardened Al Alloys: Examples of Failures and Explanations for Fractographic Observations

2014 ◽  
Vol 891-892 ◽  
pp. 248-253 ◽  
Author(s):  
Rohan Byrnes ◽  
Noel Goldsmith ◽  
Mark Knop ◽  
Stan Lynch
Keyword(s):  
Fatigue Crack ◽  
Fatigue Crack Growth ◽  
Crack Growth ◽  
Corrosion Fatigue ◽  
Compact Tension ◽  
Al Alloys ◽  
Corrosion Fatigue Crack ◽  
Crack Tips ◽  
Corrosion Fatigue Crack Growth ◽  
Additional Support

The characteristics of corrosion-fatigue in age-hardened Al alloys, e.g. brittle striations on cleavage-like facets, are described, with reference to two examples of component failure. Mechanisms of corrosion fatigue (and explanations for fracture-surface features) are then reviewed. New observations of corrosion-fatigue crack growth for 7050-T7451 alloy compact-tension specimens tested in aqueous environments using a constant (intermediate) ΔK value but different cycle frequencies are then described and discussed. These observations provide additional support for a hydrogen-embrittlement process involving adsorption-induced dislocation-emission from crack tips.

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