Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Pipeline steel"”.
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Effect of plastic strain on the corrosion of X65 pipeline steel
… and failure for iron alloys used in oil and gas pipelines. Pitting corrosion is a particular type of corrosion that is not well-understood and can play in important role in material failure. Research has shown that areas of increased plastic strain develop within pits which may promote crack …
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Hydrogen dissociative adsorption on pipeline steels in high-pressure gaseous environments
… the pursuit of achieving the net-zero target. Pipeline can serve as an ideal transportation method for H2 due to its high efficiency, large capacity, and relatively low cost. However, H2 pipelines are facing the problem of Hydrogen Embrittlement (HE), which might cause catastrophic failure. …
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Hydrogen permeation in uncoated and coated X60steel
… of hydrogen–material interactions in pipeline steels and effective strategies to limit hydrogen uptake. This PhD research investigates hydrogen diffusion and permeation in API 5L X60 pipeline steel, with a focus on the development and validation of experimental and analytical …
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Stress corrosion cracking and corrosion of carbon steel in simulated fuel-grade ethanol
… one major concern in using the existing gas-pipelines to transport fuel-grade ethanol or blended fuel is the potential corrosion and stress corrosion cracking (SCC) susceptibility of carbon steel pipelines in these environments. Both phenomenological and mechanistic investigations have been …
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Magnetoquasistatic sensors for rapid imaging of steel pipeline properties
… solution for imaging the metallic properties of pipelines. The target problem addressed is rapidly imaging pipeline steel thickness through thick insulation and weatherjacketing materials in order to detect areas of corrosion. The following bullet points outline the advancements in sensor design, …
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Experimental and modelling studies of pit-to-crack transition under corrosion fatigue conditions
… The material under current investigation is X65 pipeline steel. A galvanostatic method was applied to artificially generate pits on a smooth surface of the material to produce a pitted specimen. The specimen was then cyclically loaded in four-point bending in air, NaCl solution and CO2-saturated …
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Microstructure Optimization to Prevent Hydrogen-Induced Cracking of API X70 Pipeline Steels in Sour Environments
… demand for oil and gas resources, the failure of pipeline steels has become one of the crucial topics in the oil and gas transportation industry. The failure of pipeline steels is divided into two major categories: stress corrosion cracking (SCC) and hydrogen assistant cracking (HAC). …
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Elevated temperature mechanical properties of line pipe steels
… the tensile properties of X70 and X52 line pipe steels were evaluated. Testing temperatures of interest were in the range of 25 to 350 °C, at engineering strain rates in the range of approximately 10 4 to 10 3 s 1. The X70 steel had a quasi-polygonal ferrite microstructure with austenite, …
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Influence of crystallographic texture in X70 pipeline steels on toughness anisotropy and delamination
… texture in four commercially-produced API X70 pipeline steels and their relation to planar anisotropy of toughness and delamination were evaluated. The experimental steels were processed through either a hot strip mill, a Steckel mill, or a compact strip mill. Different processing routes were …