Preface

Gianfrancesco, A. Di

doi:10.1016/b978-0-08-100552-1.05001-6

Cited by 7 publications

(10 citation statements)

References 0 publications

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“…Similarly, carbon-geo storage (CGS)) requires the injection of CO 2 into porous geological formations located at least 800 m under the Earth's surface to realize pressures and temperatures to attain a liquid or supercritical phase. 55,56 At the CO 2 storage site, CO 2 is injected under pressure into the geological formation and once injected, it moves up through the storage site until it reaches an impermeable layer of rock called cap rock, overlaying the storage site, which traps the carbon dioxide in the storage formation. This storage mechanism is called “structural storage”.…”

Section: Underground Hydrogen Storage In Geological Structuresmentioning

confidence: 99%

Perspectives and prospects of underground hydrogen storage and natural hydrogen

Epelle

Obande

Udourioh

et al. 2022

Sustainable Energy Fuels

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Section: Underground Hydrogen Storage In Geological Structuresmentioning

confidence: 99%

Perspectives and prospects of underground hydrogen storage and natural hydrogen

Epelle

Obande

Udourioh

et al. 2022

Sustainable Energy Fuels

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“…), in which the materials are to be exposed to various harsh environments including either static or dynamic stress conditions, different levels of oxidizing/corrosive environments, and elevated temperatures. [1][2][3] The balance among mechanical properties, surface protection, manufacturability, and cost affordability is key for material selection, and these features must always be considered and satisfied in any new alloy designs. Commercially available heat-resistant steels and alloys may not always satisfy all these demands, resulting in compromising aggressiveness of the service condition fitting with the material limitation, such as lowering upper-limit service temperatures or applied pressures during operation.…”

Section: Introductionmentioning

confidence: 99%

Creep Behavior and Phase Equilibria in Model Precipitate Strengthened Alumina-Forming Austenitic Alloys

Yamamoto

Brady

Ren

et al. 2022

JOM

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Creep-rupture behavior and microstructural response in alumina-forming austenitic (AFA) alloys with two different precipitation strengthening mechanisms, “Laves-phase + M23C6 carbide” and “coherent L12 γ′-Ni3(Al,Ti),” were explored as “model” cases of multi-phase, multi-scale heat-resistant AFA alloys for 650–750°C use. These alloys will be used to guide and verify computational alloy design and life-prediction modeling under an on-going eXtremeMAT project through the Office of Fossil Energy and Carbon Management, US Department of Energy. Computational thermodynamics were used to design and predict the amounts of strengthening and deteriorating secondary phases at 750°C. Creep-rupture lives of the alloys tested at 750°C and 100 MPa were in a range of 4000–9000 h, and the microstructure at the gage/grip after creep-rupture testing was compared with isothermally aged alloys for 1500 h, as well as the calculated phases. Detailed microstructure characterization includes phase identification, volume fraction measurement, and compositional analysis, which were correlated with the creep-rupture properties. High-temperature oxidation resistance was also screened and compared with commercial, chromia-forming heat-resistant steels. These model alloys also provide the basis for further design and optimization of next generation AFA alloys with improved creep resistance.

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“…Damage and failures, however, occurs frequently in these components [ 3 , 4 , 5 , 6 , 7 ]. X12CrMoWvNBN 10-1-1 steel, for example, has excellent high-temperature properties and is widely used in ultra-supercritical units, but it is vulnerable to creep and creep-fatigue damage [ 8 , 9 , 10 ]. It is thus necessary to understand its creep and/or-fatigue damage behavior.…”

Section: Introductionmentioning

confidence: 99%

Creep-Fatigue Crack Initiation Simulation of a Modified 12% Cr Steel Based on Grain Boundary Cavitation and Plastic Slip Accumulation

et al. 2021

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High-temperature components in power plants may fail due to creep and fatigue. Creep damage is usually accompanied by the nucleation, growth, and coalescence of grain boundary cavities, while fatigue damage is caused by excessive accumulated plastic deformation due to the local stress concentration. This paper proposes a multiscale numerical framework combining the crystal plastic frame with the meso-damage mechanisms. Not only can it better describe the deformation mechanism dominated by creep from a microscopic viewpoint, but also reflects the local damage of materials caused by irreversible microstructure changes in the process of creep-fatigue deformation to some extent. In this paper, the creep-fatigue crack initiation analysis of a modified 12%Cr steel (X12CrMoWvNBN10-1-1) is carried out for a given notch specimen. It is found that creep cracks usually initiate at the triple grain boundary junctions or at the grain boundaries approximately perpendicular to the loading direction, while fatigue cracks always initiate from the notch surface where stress is concentrated. In addition to this, the crack initiation life can be quantitatively described, which is affected by the average grain size, initial notch size, stress range and holding time.

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Preface

Cited by 7 publications

References 0 publications

Perspectives and prospects of underground hydrogen storage and natural hydrogen

Perspectives and prospects of underground hydrogen storage and natural hydrogen

Creep Behavior and Phase Equilibria in Model Precipitate Strengthened Alumina-Forming Austenitic Alloys

Creep-Fatigue Crack Initiation Simulation of a Modified 12% Cr Steel Based on Grain Boundary Cavitation and Plastic Slip Accumulation

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