Estimation of the Influence of Compressed Hydrogen on the Mechanical Properties of Pipeline Steels

Bolobov, V. I.; Latipov, Il’nur U.; Popov, Gregory G.; Buslaev, George V.; Martynenko, Y.V.

doi:10.3390/en14196085

Cited by 23 publications

(8 citation statements)

References 36 publications

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“…The first approach, often referred to as the “bottom-up process”, is based on the aggregation of individual atoms or nanoscale particles to create a compact material. These include vapor deposition processes, electrolytic deposition processes and powder metallurgy methods [ 30 , 31 , 32 ]. These methods allow the production of nanocrystalline materials with very small grain sizes but with limited workpiece dimensions.…”

Section: Introductionmentioning

confidence: 99%

Development of a Thermomechanical Treatment Mode for Stainless-Steel Rings

et al. 2022

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This article describes a technology for the thermomechanical treatment of stainless-steel piston rings. This technology makes it possible to obtain rings with an optimal combination of plastic and strength properties that is essential for piston rings. The following thermomechanical treatment is suggested for piston rings manufacturing: quenching at 1050 °C, holding for 30 min and cooling in water, then straining by the HPT method for eight cycles at cryogenic temperature and annealing at a temperature up to 600 °C. The resulting microstructure consisted of fine austenite grains sized 0.3 μm and evenly distributed carbide particles. Annealing above this temperature led to the formation of ferrite in the structure; however, preserving the maximum fraction of austenitic component is very important, since the reduction of austenite in the structure will cause a deterioration of corrosion resistance. The strength properties of steel after such treatment increased by almost two times compared with the initial ones: microhardness increased from 980 MPa to 2425 MPa, relative elongation increased by 20%. The proposed technology will improve the strength and performance characteristics of piston rings, as well as increase their service life, which will lead to significant savings in the cost of repair, replacement and downtime.

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Section: Introductionmentioning

confidence: 99%

Development of a Thermomechanical Treatment Mode for Stainless-Steel Rings

et al. 2022

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“…Methods of mathematical statistics, factorial and regression analysis are used for the experimental study of the power consumption of consumers of the power plant [19][20][21][22]. The measurements were carried out during the implementation of an energy survey of a non-ferrous metallurgy enterprise using modern measuring systems [8][9][10][11]24].…”

Section: Methodsmentioning

confidence: 99%

Mathematical modeling of energy consumption in the production of hydrogen

Klyuev

Guzueva

Kunitsyn

2022

J. Phys.: Conf. Ser.

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The article discusses the technological process of hydrogen production at metallurgy. Mathematical models of the dependence of power consumption and specific consumption depending on various parameters have been obtained, which make it possible to calculate and predict. In the electrolyzer, the change in the component of the specific power consumption by the amount of potassium dichromate (chromium peak) over time is analyzed. Therefore, the analysis of the dependence of the specific power consumption in time was carried out directly on the basis of the results of an experimental study of the dependence of the change in time of the voltage on the electrolyzer when the electrolyzer was loaded with chromium peak. The most important issue of reducing electricity consumption due to the use of a gas holder in the mode of consumer-regulator has been investigated. Controlling the level of deviations in power consumption (±2%) in comparison with the normative (±5%) allows increasing the margin of "safety" in terms of load regulation time, reducing the likelihood of it going beyond the normative level and, accordingly, reducing the payment for deviations in the volume of electrical energy consumption.

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“…Engineering approaches to determining the strength parameters [1][2][3] of fracture mechanics occupy an important place in the direction of increasing the service life of technological objects and various materials [4,5]. The modern global oil and gas industry is experiencing a serious upswing in all sectors, and predicting strength and durability is of paramount importance [6][7][8]. A special place is occupied by the issues of the strength and fracture of steels for the pipeline transportation of hydrocarbons [9,10].…”

Section: Introductionmentioning

confidence: 99%

Thermally Activated Crack Growth and Fracture Toughness Evaluation of Pipeline Steels Using Acoustic Emission

Perveitalov

Носов

Schipachev

et al. 2023

Metals

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The article presents an approach to assessing the fracture toughness of structural alloys based on thermally activated crack growth and recording acoustic emission signals. The kinetic and structural features of the stable growth of the initiated crack are estimated using a multilevel acoustic emission model based on the time dependence of the logarithm of the cumulative acoustic emission count. The article provides an evaluation of the stable kinetic constants included in the equation of the thermal fluctuation steps of a crack according to literature sources and using the acoustic emission method. It is shown that parameters such as activation energy, activation area before the crack tip, and the rate of non-activation crack growth are stable and show a satisfactory correspondence between the reference literature and real experiments. The approach does not require a set of laboratory experiments to determine the empirical constants of traditional crack growth rate equations, and it also differs in that it takes into account the unique features of the destruction of a particular specimen or technological equipment and allows for a non-destructive assessment of fracture toughness. The values obtained are conservative. The concentration criterion of destruction requires further investigation.

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Estimation of the Influence of Compressed Hydrogen on the Mechanical Properties of Pipeline Steels

Cited by 23 publications

References 36 publications

Development of a Thermomechanical Treatment Mode for Stainless-Steel Rings

Development of a Thermomechanical Treatment Mode for Stainless-Steel Rings

Mathematical modeling of energy consumption in the production of hydrogen

Thermally Activated Crack Growth and Fracture Toughness Evaluation of Pipeline Steels Using Acoustic Emission

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