Reasons for Crack Arrest in Stress Corrosion Cracking Tests—Crack Propagation Rate in High-Strength Steels

CORROSION ◽  
2009 ◽  
Vol 65 (6) ◽  
pp. 368-375 ◽  
Author(s):  
J. Sanchez ◽  
C. Andrade ◽  
J. Fullea
Keyword(s):  
Crack Propagation ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
High Strength Steels ◽  
Crack Propagation Rate ◽  
High Strength ◽  
Crack Arrest ◽  
Propagation Rate ◽  
Corrosion Cracking

scholarly journals Modelling Intergranular Stress Corrosion Cracking in Simulated Three-Dimensional Microstructures

2007 ◽  
Vol 345-346 ◽  
pp. 1019-1022
Author(s):  
Andrey P. Jivkov ◽  
Nicholas.P.C. Stevens ◽  
T.James Marrow
Keyword(s):  
Crack Propagation ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Three Dimensional ◽  
Crack Propagation Rate ◽  
Propagation Rate ◽  
Corrosion Cracking ◽  
Intergranular Stress Corrosion ◽  
Crack Bridging ◽  
Intergranular Stress Corrosion Cracking

Microstructure can have a significant effect on the resistance to intergranular stress corrosion cracking. Certain grain boundaries are susceptible to corrosion while others have high resistance and may form crack bridging ligaments as the crack deviates around them. To investigate the mechanics of crack bridging, 3D computational model has been previously developed. An extension to the model, to include stress corrosion crack growth kinetics is presented in this paper. An analysis of the effects of resistant grain boundary fraction demonstrates that the bridging ligaments can significantly retard short crack propagation rates. Increasing the fraction of resistant boundaries is shown to improve microstructure resistance by reducing the crack propagation rate.

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