Fracture Toughness Assessment of the Susceptibility for Sulfide Stress Corrosion Cracking in High Strength Carbon Steels: A review

CORROSION ◽  
10.5006/3610 ◽  
2020 ◽  
Author(s):  
Raymundo Case ◽  
Bostjan Bezensek
Keyword(s):  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Intensity Factor ◽  
Crack Propagation ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
High Strength ◽  
Carbon Steels ◽  
Sulfide Stress ◽  
Sulfide Stress Corrosion Cracking

High strength carbon steels typically used as oil country tubular goods can be susceptible to sulfide stress corrosion cracking (SSC) when in service in environments that contain H2S. In the last 25 years, linear-elastic fracture mechanics has been used to understand both the mechanistic aspects of this form of cracking and to quantify the susceptibility to SSC of different OCTG steel grades. This paper presents a review on the evolution of the Double Cantilever Method (DCB) as a standard practice to assess the threshold stress intensity factor KISSC. The paper evaluates the capabilities and limitations of this testing method to describe the conditions associated with crack propagation. The review study indicates that new fracture parameters based on the energy required for crack propagation such as J-integral JIc might be required to overcome the limitations of the static conditions implied in the stress intensity factor KIc evaluation approach

Effects of Overloads on the Incubation Time for Stress Corrosion Cracking of 7075 Aluminum

CORROSION ◽  
1982 ◽  
Vol 38 (6) ◽  
pp. 330-335 ◽  
Author(s):  
A. H. Hanisch ◽  
L. H. Burck
Keyword(s):  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Intensity Factor ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Incubation Time ◽  
High Strength ◽  
Critical Stress Intensity Factor ◽  
Corrosion Cracking ◽  
Cracking Behavior

Abstract A series of tests was conducted on precracked high strength aluminum alloy 7075-T651 plate to determine the effects of overstressing on the short-transverse stress corrosion cracking behavior. Fatigue precracked wedge-opening-loading specimens were preloaded in air to various percentages of the critical stress intensity factor, unloaded, and reloaded statically to lower stress intensity factor levels. The samples were then alternately immersed in an aqueous 3.5% sodium chlorine solution for stress corrosion testing. The incubation time which preceded crack extension by stress corrosion cracking was found to increase substantially for higher percentages of preloading. Furthermore, for a given percentage of prestress overload, greater effects were observed for higher applied stress intensity factor levels. The increase in incubation period produced by stress overloading is attributed primarily to the effects of residual compressive stresses at the crack tips.

scholarly journals Causes of Structural Heterogeneity in High-Strength OCTG Tubes and Minimizing Their Impact on Sulfide Stress Corrosion Cracking Resistance

Metals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1843
Author(s):  
Artem Davydov ◽  
Andrey Zhitenev ◽  
Alexey Alhimenko ◽  
Natalya Devyaterikova ◽  
Konstantin Laev
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
High Strength ◽  
Structural Heterogeneity ◽  
Corrosion Cracking ◽  
Corrosion Properties ◽  
Sulfide Stress ◽  
Mechanical And Corrosion Properties ◽  
Quenching And Tempering ◽  
Sulfide Stress Corrosion Cracking

High-strength oil country tubular goods (OCTG) like C110, according to standard API 5CT (yield strength at least 758 MPa), are subject to requirements in terms of mechanical and corrosion properties. In this work, we studied the microstructure of seamless casing tubes made of class C110 high-strength steel with a 194.5 mm diameter and 19.7 mm wall thickness, and its influence on sulfide stress corrosion cracking (SSC). Casing tubes were obtained from continuous billets by screw piercing with preliminary quenching and tempering. It was shown that cracking during the tests always begins from the inner surface of the tube. Rough segregation bands were found on the inner tube surface, which occupies about a third of the thickness of the wall. To increase the resistance of 0.3C-Cr-Mn-Mo + 0.15(V + Nb + Ti) steel to SSC, primary recommendations for adjusting the chemical composition, production technology and heat treatment were developed.

Stress-Corrosion Cracking in Unidirectional GFRP Composites

2010 ◽  
Vol 430 ◽  
pp. 101-113
Author(s):  
Hideki Sekine ◽  
Peter W.R. Beaumont
Keyword(s):  
Growth Rate ◽  
Stress Intensity Factor ◽  
Stress Intensity ◽  
Crack Growth Rate ◽  
Intensity Factor ◽  
Glass Fiber ◽  
Stress Corrosion ◽  
Crack Growth ◽  
Stress Corrosion Cracking ◽  
Matrix Crack

A micromechanical theory of macroscopic stress-corrosion cracking in unidirectional glass fiber-reinforced polymer composites is proposed. It is based on the premise that under tensile loading, the time-dependent failure of the composites is controlled by the initiation and growth of a crack from a pre-existing inherent surface flaw in a glass fiber. A physical model is constructed and an equation is derived for the macroscopic crack growth rate as a function of the apparent crack tip stress intensity factor for mode I. Emphasis is placed on the significance of the size of inherent surface flaw and the existence of matrix crack bridging in the crack wake. There exists a threshold value of the stress intensity factor below which matrix cracking does not occur. For the limiting case, where the glass fiber is free of inherent surface flaws and matrix crack bridging is negligible, the relationship between the macroscopic crack growth rate and the apparent crack tip stress intensity factor is given by a simple power law to the power of two.

Prevention of Stress Corrosion Cracking of SUS304 by Tensile Overload

2010 ◽  
Author(s):  
Hayato Sano ◽  
Koji Takahashi ◽  
Kotoji Ando
Keyword(s):  
Stress Intensity Factor ◽  
Stainless Steel ◽  
Stress Intensity ◽  
Intensity Factor ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Threshold Stress ◽  
Threshold Stress Intensity ◽  
Threshold Stress Intensity Factor ◽  
Tensile Overload

The effects of overload on the threshold stress intensity factor (KISCC) for stress corrosion cracks (SCC) in stainless steel were studied. Tensile overload was applied to a wedge opening loaded specimen of SUS304, and SCC tests were carried out to determine the resultant KISCC. The value of KISCC was found to increase with increasing stress intensity caused by tensile overload. Comparison of the effects of tensile overload on KISCC of SUS304 and SUS316 revealed that the effect on KISCC of SUS304 was smaller than that of SUS316.

scholarly journals Influence of Structural Heterogeneity of High-Strength OCTG Tubes on Sulfide Corrosion Cracking Resistance

2021 ◽  
Vol 3 (1) ◽  
pp. 5
Author(s):  
Artem Davydov ◽  
Andrey Zhitenev ◽  
Natalya Devyaterikova ◽  
Konstantin Laev
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
High Strength ◽  
Threshold Value ◽  
Structural Heterogeneity ◽  
Corrosion Cracking ◽  
Corrosion Properties ◽  
Sulfide Corrosion ◽  
Sulfide Stress ◽  
Sulfide Stress Corrosion Cracking

High-strength oil country tubular goods (OCTG) like C110, according to standard API 5CT (yield strength at least 758 MPa), are subject to requirements in terms of mechanical and corrosion properties. In this work, we studied the influence of seamless tubes microstructure with a 177.8 mm diameter and 10.36 mm wall thickness of class С110 high-strength steel to sulfide stress corrosion cracking (SSC) and sulfide stress corrosion cracking with low strain rates (SSRT). Tubes were obtained from continuous billets by screw piercing with preliminary quenching and tempering. It was established that cracking during the tests always begins from the inner surface of the tube. Rough segregation bands were found on the inner tube surface, which occupies about a third of the thickness. It is shown that the SSRT assessment technique allows to estimate the threshold value of the resistance.

Sulfide Stress Corrosion Cracking of Steels

CORROSION ◽  
1970 ◽  
Vol 26 (5) ◽  
pp. 177-188 ◽  
Author(s):  
L. M. DVORACEK
Keyword(s):  
Stress Intensity ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Stress Intensity Factors ◽  
Critical Stress ◽  
Corrosion Cracking ◽  
Intensity Factors ◽  
Sulfide Stress ◽  
Sulfide Stress Corrosion Cracking ◽  
Critical Constants

Abstract Critical nominal stress and critical stress intensity factors for sulfide stress corrosion cracking of various steels were determined using fatigue-precracked, laboratory, cantilever beam specimens and short lengths of oil field casing and tubing pressured to failure. The laboratory critical constants were found to be lower than those obtained from short lengths of casing and tubing containing longitudinal internal surface notches. Acceptable steels were defined by statistical methods as those which did not crack in sulfide environments when stressed to their yield strength. The effects of sodium chloride, pH, hydrogen sulfide concentration, temperature, cold working, heat treatment and strength of the steel on these critical constants were determined. Critical flaw sizes which can be used for inspection were calculated from the critical stress intensity factors.

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