Sensitization and Stress Corrosion Crack Response of Dual Certified Type 304/304L Stainless Steel

CORROSION ◽  
10.5006/2727 ◽  
2018 ◽  
Vol 74 (7) ◽  
pp. 737-746
Author(s):  
K.B. Fisher ◽  
B.D. Miller ◽  
E.C. Johns ◽  
R. Hermer ◽  
C. Brown ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Stress Corrosion ◽  
304 Stainless Steel ◽  
304L Stainless Steel ◽  
Low Carbon ◽  
Delta Ferrite ◽  
The Matrix ◽  
Oxygenated Water ◽  
Deformation Level ◽  
Type 304

Sensitization has previously been implicated in the stress corrosion cracking (SCC) susceptibility of carbon-containing Type 304 stainless steel (SS) in oxygenated water. Thus, Type 304L SS, with low carbon content, is expected to be resistant to sensitization and therefore SCC susceptibility. The current work evaluates the SCC response of two heats of dual certified Type 304/304L SS that exhibit different microchemical characteristics. One heat contains elevated boron content, while the other heat has delta ferrite stringers in the matrix. It is shown that both heats can be susceptible to SCC because of their unique microchemical features under certain combinations of heat treatment, water chemistry, and deformation level, while under other conditions they remain relatively resistant to SCC.

Elastic-Plastic Fracture Mechanics Analysis on Environmentally Accelerated Cracking of Stainless Steel in High Temperature Water

1985 ◽  
Vol 107 (3) ◽  
pp. 240-245 ◽  
Author(s):  
T. Kawakubo ◽  
M. Hishida
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
Fracture Mechanics ◽  
Stress Corrosion ◽  
Crack Growth ◽  
Mechanistic Model ◽  
304 Stainless Steel ◽  
Elastic Plastic ◽  
Oxygenated Water ◽  
Type 304

Stress corrosion crack growth during slow strain rate testing was investigated using elastic-plastic fracture mechanics. Thin compact and center-notched specimens of sensitized Type 304 stainless steel were examined at different extension rates in high temperature oxygenated water. The analytical results showed that the crack growth rate has a best correlation with a time differential of the J-integral, which is an estimate of a crack tip deformation rate. Based on the analysis, a new mechanistic model under both monotonic and cyclic loadings was suggested, where cracking was classified into three categories depending on the environmental acceleration, i.e., mechanical cracking, corrosion enhanced mechanical cracking, and stress corrosion cracking.

scholarly journals Acoustic emission characteristics of stress corrosion cracks in a type 304 stainless steel tube

2015 ◽  
Vol 47 (4) ◽  
pp. 454-460 ◽  
Author(s):  
Woonggi Hwang ◽  
Seunggi Bae ◽  
Jaeseong Kim ◽  
Sungsik Kang ◽  
Nogwon Kwag ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Acoustic Emission ◽  
Stress Corrosion ◽  
Steel Tube ◽  
304 Stainless Steel ◽  
Stainless Steel Tube ◽  
Emission Characteristics ◽  
Type 304 ◽  
Type 304 Stainless Steel
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