Grain boundary structure and intergranular stress corrosion crack initiation in high temperature water of a thermally sensitised austenitic stainless steel, observed in situ

Stratulat, Alisa; Duff, Jonathan; Marrow, James

doi:10.1016/j.corsci.2014.04.050

Cited by 86 publications

(41 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…5. Recent studies 54,55 explored newer methods to examine threedimensional effects of the GB network on corrosion or stress corrosion cracking propagation by focused ion beam (FIB) serial sectioning and three-dimensional electron backscatter diffraction (EBSD) and is planned for a future follow-up study. FIB crosssectional and/or three-dimensional EBSD provide improved means to determine the full macroscopic GB description and localized GB network effects.…”

Section: Role Of Gb Character In Igcmentioning

confidence: 99%

Tracking the evolution of intergranular corrosion through twin-related domains in grain boundary networks

et al. 2018

View full text Add to dashboard Cite

Tailoring the grain boundary network is desired to improve grain boundary-dependent phenomena such as intergranular corrosion. An important grain boundary network descriptor in heavily twinned microstructures is the twin-related domain, a cluster of twinrelated grains. We indicate the advantages of using twin-related domains and subsequent statistics to provide new insight into how a grain boundary networks respond to intergranular corrosion in a heavily twinned grain boundary engineered 316L stainless steel. The results highlight that intergranular corrosion is typically arrested inside twin-related domains at coherent twins or low-angle grain boundaries. Isolated scenarios exist, however, where intergranular corrosion propagation persists in the grain boundary network through higher-order twin-related boundaries.

show abstract

Section: Role Of Gb Character In Igcmentioning

confidence: 99%

Tracking the evolution of intergranular corrosion through twin-related domains in grain boundary networks

et al. 2018

View full text Add to dashboard Cite

show abstract

“…For instance, DIC can be used to detect crack initiation; examples include the effect of strain state on high cycle fatigue initiation [28] and in situ studies of stress corrosion crack initiation at ambient [29,30] and elevated temperatures [31]. Some early analyses used leastsquares methods to fit the Williams' series to the DIC results, and obtained the mode I SIF [32].…”

Section: Introductionmentioning

confidence: 99%

J-Integral Calculation by Finite Element Processing of Measured Full-Field Surface Displacements

et al. 2017

View full text Add to dashboard Cite

A novel method has been developed based on the conjoint use of digital image correlation to measure full field displacements and finite element simulations to extract the strain energy release rate of surface cracks. In this approach, a finite element model with imported full-field displacements measured by DIC is solved and the J-integral is calculated, without knowledge of the specimen geometry and applied loads. This can be done even in a specimen that develops crack tip plasticity, if the elastic and yield behaviour of the material are known. The application of the method is demonstrated in an analysis of a fatigue crack, introduced to an aluminium alloy compact tension specimen (Al 2024, T351 heat condition).

show abstract

“…The relationship between thermally induced Cr depletion and IGSCC were reported [5]. However, it has been observed that the role of the GB crystallography was likely secondary and the GB normal stress (higher than the yield strength) played the primary role in IGSCC initiation in the sensitized A304 steel, even if the proportion of the cracked low indexed GB planes (20%) was higher than the one (12%) in a random selection [51]. The chemical composition and the presence of carbides in the GB was likely decisive, but further observation and analyses are necessary for predictive models.…”

Section: Type 1-brittle Intergranular Fracturementioning

confidence: 99%

Overview of Intergranular Fracture of Neutron Irradiated Austenitic Stainless Steels

Hojná

2017

Metals

View full text Add to dashboard Cite

Austenitic stainless steels are normally ductile and exhibit deep dimples on fracture surfaces. These steels can, however, exhibit brittle intergranular fracture under some circumstances. The occurrence of intergranular fracture in the irradiated steels is briefly reviewed based on limited literature data. The data are sorted according to the irradiation temperature. Intergranular fracture may occur in association with a high irradiation temperature and void swelling. At low irradiation temperature, the steels can exhibit intergranular fracture at low or even at room temperatures during loading in air and in high temperature water (~300 • C). This paper deals with the similarities and differences for IG fractures and discusses the mechanisms involved. The intergranular fracture occurrence at low temperatures might be correlated with decohesion or twinning and strain martensite transformation in local narrow areas around grain boundaries. The possibility of a ductile-to-brittle transition is also discussed. In case of void swelling higher than 3%, quasi-cleavage at low temperature might be expected as a consequence of ductile-to-brittle fracture changes with temperature. Any existence of the change in fracture behavior in the steels of present thermal reactor internals with increasing irradiation dose should be clearly proven or disproven. Further studies to clarify the mechanism are recommended.

show abstract

Grain boundary structure and intergranular stress corrosion crack initiation in high temperature water of a thermally sensitised austenitic stainless steel, observed in situ

Cited by 86 publications

References 28 publications

Tracking the evolution of intergranular corrosion through twin-related domains in grain boundary networks

Tracking the evolution of intergranular corrosion through twin-related domains in grain boundary networks

J-Integral Calculation by Finite Element Processing of Measured Full-Field Surface Displacements

Overview of Intergranular Fracture of Neutron Irradiated Austenitic Stainless Steels

Contact Info

Product

Resources

About