...Accelerated Testing The environments selected for testing the crack sensor include cyclic RH, ASTM B117, and ASTM G85 A5. The specific experimental procedures for each test are further described in the following subsections. Cyclic Relative Humidity Abstract Stress corrosion cracking (SCC...

...The risk of stress-corrosion cracking was assessed at two separate temperature ranges (104-121°C) 220-250°F (line heater shell and heater tube condition), and (204°C) 400°F (fire tube condition) The laboratory employed three experimental methods for this study: Abstract Carbon steel pipeline...

...EXPERIEMENTAL PROCEDURE Environmental cracking tests were undertaken to test whether the cracking observed in the field might have been caused by Liquid mercury embrittlement (Hg LME) Corrosion-generated hydrogen, or stress-corrosion cracking Diffusible hydrogen from a variety of possible...

... of the increased usage of ethanol as an oxygenating agent for gasoline and interest in ethanol as an alternative fuel. Currently, FGE is transported primarily by railroad tanker cars, tanker trucks, and barges. Stress corrosion cracking (SCC) has been observed in carbon steels in contact with FGE in user terminals...

... cars, tanker trucks, and barges. Stress corrosion cracking (SCC) has been observed in carbon steels in contact with FGE ethanol in user terminals, storage tanks, and loading/unloading racks. This paper summarizes the results of recent research, funded by the Pipeline Research Council International...

...Abstract Operating pipelines are subjected to cyclic loadings, primarily as a result of pressure fluctuations. The cyclic loadings are a contributing factor in crack growth by near-neutral pH stress corrosion cracking (SCC). As part of pipeline integrity management programs, it is necessary...

... concerning mechanisms of hydrogen embrittlement (HE), especially in steels, nickel, and titanium alloys. Mechanisms of stress-corrosion cracking (SCC) in aluminium alloys, magnesium, and other materials where hydrogen effects are involved are also discussed. HE involving the formation of brittle hydrides...

... on crack growth of AA5083 and to identify the possible role of H. hydrogen Al-Mg alloy stress-corrosion cracking INTRODUCTION Evidence for complementary or competing roles of anodic dissolution and H induced crack growth is very prevalent in Al alloys. Dissolution of active intermetallic phases or grain...

... are distinctly larger in the case of mechanically assisted cracking (the non-sensitized stainless steel in sodium thiocyanate, and both types of steel in de-ionized water) than in the case of the stress-corrosion cracking process (Type II for sensitized stainless steel in a sodium thiocyanate solution). However...

... to properly determine the cause of the fracture. Some fasteners holding the ring gear bearing assembly together failed due to hydrogen embrittlement but the cause of failure of the ring gear was stress corrosion cracking. Stress-corrosion cracking water intrusion weapons system hydrogen embrittlement...

... in crack growth tests. stress-corrosion cracking pipelines potentiodynamic polarization hydrogen permeation crack growth BACKGROUND External stress corrosion cracking (SCC) continues to be an integrity concern for the natural gas pipeline industry. Two forms of cracking have been identified; namely...

... of the simulated hydrostatic test sequence. Crack extension was also observed as a result of unloading and reloading a specimen containing a growing stress-corrosion crack, but this process did not inhibit crack growth. The results of the study suggested that hydrostatic testing may be no more or even less...

... be periodically ruptured and repassivated. Thus, many initial sites for the occurrence of stress corrosion cracks can be generated. However, in spite of relatively severe aggressive corrosion conditions, a relatively long time elapsed before final failure of the tensile test specimen occurred (61 hours...

... ⁾. However, in the neutral aqueous condition, the susceptibility toward the stress-corrosion cracking is thought to be extremely low^{( 8 ),( 9 )}. The present investigation has been conducted further for establishing a quantitative life assessment model by performing detailed observation of cracks...

...Factors responsible for the susceptibility of non-sensitized stainless steels to intergranular stress-corrosion cracking were thus examined in this study by means of the creviced bent-beam (CBB) test^5,6 as a laboratory accelerated test under the above condition, as well as grain boundary...

... exposed to a concentrated magnesium chloride solution) during uniform corrosion, cannot yet provide any satisfactory explanation of the complex mechanisms of stress-corrosion cracking processes. electrochemical noise stress-corrosion cracking U-bend specimens SSRT tests austenitic stainless steel...

... stress-corrosion cracking of pipelines is a serious problem for the gas transmission industry. Longitudinal cracks initiate on the outside surface of the pipe and link up to form flaws that, in some cases, can lead to pipe rupture. This paper presents a model that quantifies the effect of stress...

... to contribute to at least three types of failure: stress-corrosion cracking, overheating, and corrosion gouging. A case history illustrating each one of these failure mechanisms is presented. CASE STUDIES Case History 1 - SCC A cracked section of grade T11 (1.25% chromium, 0.5% molybdenum [UNS No. K11597...

... crack was used to demonstrate the validation of this method for detection of stress-corrosion cracking. For detection of crevice corrosion, laser illumination must be applied. Digital speckle correlation takes both the advantage of digital image correlation and laser speckle properties. The speckle...

...Abstract In order to discuss the effects of chromium and niobium contents on the susceptibility of Alloy 600 type nickel-base alloys to stress-corrosion cracking in the BWR promary coolant environment, a series of creviced bent-beam (CBB) tests were conducted in a high-temperature, high-purity...