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Showing 1 to 13 of 13 for “"pipeline steels"”.
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Fatigue crack growth in hydrogen pipeline steels
Pipeline hydrogen transport and distribution are contemplated for hydrogen applications. Hydrogen introduction in the natural gas pipeline systems is also considered in the power to gas (P2G) approach to utilizing excess renewable energy when the supply exceeds the demand. It is well known that …
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Simulation of Ductile Fracture in Pipeline Steels Under Varying Constraint Conditions
… variations on crack tip opening angle (CTOA) of pipeline steels using modified boundary layer (MBL), and (2) to simulate ductile crack propagation in pipeline steels using drop weight tear test (DWTT) and comparing these FE simulations with experimental results. The calibration of various CZM was …
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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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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 …
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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 …
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Micromechanics of Hydrogen-Induced Crack Initiation in Pipeline Steels and Subcritical Crack Growth
To further explore the influence of hydrogen on ductile fracture, we model sustained-load cracking in the iron-base superalloy 1N903 at hydrogen pressures at which fracture is governed by plasticity. Through a micromechanics analysis, we quantify the void growth dependence on stress triaxiality and …
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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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Plastic buckling in gas transmission line-pipes, cold formed from thermo-mechanically-controlled rolling of low-allow steel plates
… gases over long distances. The strength-grade of pipeline steels used for transportation of gases has been increasing to reduce the cost of the overall pipeline system. Along with higher strength, adequate fracture toughness and resistance to plastic buckling are required of pipes installed in …
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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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A new approach to discovering the fundamental mechanisms of hydrogen failure
… and loading conditions likely to be encountered. Pipeline steels, considered for hydrogen transport, were loaded in compact tension configuration in high pressure hydrogen gas. Nickel, charged with a high concentration of hydrogen, was tested in uniaxial tension. Two stainless steel alloys, used …
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Elevated temperature mechanical properties of line pipe steels
… on the tensile properties of four line pipe steels were evaluated. The four materials include a ferrite-pearlite line pipe steel with a yield strength specification of 359 MPa (52 ksi) and three 485 MPa (70 ksi) yield strength acicular ferrite line pipe steels. Deformation behavior, …
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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, …