Topic
Stress corrosion cracking
About: Stress corrosion cracking is a research topic. Over the lifetime, 11340 publications have been published within this topic receiving 138157 citations.
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TL;DR: In this paper, a case study of super 13Cr tubing that failed due to stress corrosion cracking (SCC) was presented, where X-ray diffraction, energy dispersive spectrometry (EDS), scanning electron microscopy (SEM), optical microscopy, and fluorescent magnetic particle inspection were used to investigate the failure mechanism.
38 citations
TL;DR: The isothermal time-temperature-sensitization diagrams of two nitrogen containing austenitic-type stainless steels (SS) namely 316 LN-B (0.019 C, 0.16 N) and 316 L N-C (0,027 C,0.19 N) have been established as mentioned in this paper.
38 citations
TL;DR: In this article, it was determined that the cracking is driven by corrosion-fatigue mechanisms with some uniqueness, such as the loading frequencies typically vary over a wide range from 10−1-Hz to 10−6-Hz, which is usually beyond the scope of most fatigue investigations.
Abstract: Stress corrosion cracking (SCC) of pipeline steels in near-neutral pH environments has remained a significant integrity risk for oil and gas pipelines. Although it has traditionally been termed “stress corrosion cracking,” crack growth has never been observed under a static loading condition. It was determined later that the cracking is driven by corrosion-fatigue mechanisms with some uniqueness. First, the loading frequencies typically vary over a wide range from 10−1 Hz to 10−6 Hz, which is usually beyond the scope of most fatigue investigations. Second, the rate of corrosion is typically well below 0.1 mm/y at which a premature failure solely by corrosion would occur much longer than that actually found in the field. Third, hydrogen, a by-product of corrosion, can be generated to a level at which hydrogen embrittlement may occur only under special conditions. Fourth, pipelines are operated under variable pressure fluctuations that may lead to enhanced crack growth resulting from load-interactions effec...
38 citations
TL;DR: In this article, a slow strain rate tensile test and fatigue crack growth (FCG) test were performed to evaluate the fracture behavior of API 5L X65 steel weldments after hydrogen-charging.
38 citations
Patent•
09 Apr 1999
TL;DR: In this paper, the authors proposed a low-alloyed steel which has a composition containing 0.15-0.3% C, 0.2-1.5% Cr and 0.1-1% Mo.
Abstract: PROBLEM TO BE SOLVED: To provide a high strength oil well steel suitable for thick-walled products, excellent in toughness and SSC resistance, and having YS of 110 ksi class or above, and inexpensively manufacturing method therefor. SOLUTION: This steel is a low alloy steel which has a composition containing 0.15-0.3% C, 0.2-1.5% Cr, 0.1-1% Mo, 0.05-0.3% V, and 0.003-0.1% Nb and in which the total amount of precipitating carbides is 1.5-4% and an MC carbide comprises 5-45% of the total amount of the carbides, and further, the proportion of an M23C6 carbide is =1150 deg.C and to hot working at >=1000 deg.C finishing temperature, applying direct quenching from >=900 deg.C and tempering at a temperature between 550 deg.C and the Ac1 transformation point, and subjecting the steel to reheating up to 850-1000 deg.C and quenching and then to tempering at a temperature between 650 deg.C and the Ac1 transformation point at least once.
38 citations