Effect of High Temperatures on the Mechanical Properties of the Weld Metal in the Welded Joint of Low-Carbon Low-Alloy Steel

Nikulin, S.; Рогачев, С. О.; Белов, В. А.; Turilina, V. Yu.; Shplis, N. V.

doi:10.1134/s0036029521100256

Cited by 3 publications

(2 citation statements)

References 6 publications

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“…It is necessary to increase the external force to make more dislocations slip so that more dislocations pile up in front of the cementite, causing enough normal stress to make the cementite fracture. Therefore, the strength and hardness of high-carbon steel mainly depend on the pearlite spacing and the size and distribution of cementite [8] .…”

Section: High Carbon Steelmentioning

confidence: 99%

Mechanical properties of carbon steel under uniaxial static tension

Wang

2023

J. Phys.: Conf. Ser.

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With the continuous development of science and technology, carbon steel is widely used in production and life. Especially at the practical application level, in the engineering application, the analysis of the mechanical properties of carbon steel materials has become increasingly prominent. The tensile test is a mechanical property test in which a standard tensile specimen is pulled to fracture at a specified tensile speed under the continuous action of static axial tensile force. The force and elongation are continuously recorded during the tensile process so as to obtain its strength criterion and plasticity criterion. In this paper, the characteristics of mechanical properties of the high, medium, and low carbon steels under uniaxial static tension are discussed. The reasons for the different mechanical properties of steels with different carbon content are explained from a microscopic perspective. The study provides some basic assistance to those who need relevant information.

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Section: High Carbon Steelmentioning

confidence: 99%

Mechanical properties of carbon steel under uniaxial static tension

Wang

2023

J. Phys.: Conf. Ser.

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“…Thus, a severe accident beyond the design basis at a nuclear power plant is associated with the destruction of the reactor vessel and melting of the core. To block the exit of the corium beyond the tight enclosure, a melt localization device or a so-called core catcher vessel (CC vessel) is provided, the main structural elements of which are composed of 09G2S steel [9]. According to calculations, the temperature of the corium entering the CC vessel exceeds several Metals 2023, 13, 1707 2 of 18 thousand degrees, and the CC vessel itself, in the process of the localization and cooling of the corium melt, is heated to temperatures of about 1200 • C [10,11].…”

Section: Introductionmentioning

confidence: 99%

Influence of Overheating on High-Cycle Fatigue Characteristics of the Base Metal and Weld Metal of Low-Carbon Steel Welded Joints

Nikulin,

Rogachev,

Prosvirnin

et al. 2023

Metals

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The results of a high-cycle fatigue testing of our samples were obtained, and a comparative assessment of the properties of the base metal and weld metal of 09G2S-type steel (13Mn6 according to the DIN17145-80 standard) before and after overheating (1200 °C, 3.7 h) was performed. The welded joints between the sheets of 09G2S steel were obtained through automatic argon arc welding. The fatigue tests were carried out under repeated tensile loading. The “maximum cycle stress—number of cycles to failure” fatigue curves of the samples were plotted. The fracture surfaces of the samples were studied, and the fatigue failure mechanisms were analyzed. It was shown that, during testing, all samples demonstrated cyclic hardening behavior. The samples of the base metal as delivered had the highest endurance limit, and the smallest endurance limit was found in the samples of the base metal and weld metal after overheating, the endurance limits of which were similar. The fracture mechanism of all samples was quasi-brittle with the presence of very thin fatigue micro-grooves. The final rupture of all samples had a ductile dimple type.

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Structure and properties of steels for manufacture of core catcher vessel of nuclear reactor

Nikulin

Рогачев

Белов

et al. 2023

Izv. vysš. učebn. zaved., Čern. metall.

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The Russian new nuclear reactors are provided with a special core catcher vessel device (cc-vessel) designed to minimize the consequences of a severe beyond design basis accident at a nuclear power plant, when the reactor pressure vessel collapses and the core melts. For manufacture of the cc-vessel structural elements, low-carbon unalloyed or low-alloyed steels are used. When a severe beyond design basis accident develops, the cc-vessel’s body is subjected to extreme temperature and force loads, which can lead to degradation of the structure, loss of strength and failure of the entire cc-vessel. To calculate the strength characteristics of the cc-vessel, which ensure its safe and reliable operation, the detailed data are required on the structure and mechanical properties of low-carbon steels at high temperatures and after extreme thermal actions simulating the development of a severe beyond design basis accident. The paper analyzes data on the structure and mechanical properties (tensile strength, crack resistance, toughness and cyclic strength) of a number of low-carbon steels under extreme temperature and force actions, including conditions simulating the development of a severe beyond design basis accident at a nuclear power plant, in order to select the material for the design of cc-vessel of nuclear reactor. New data on the structure, mechanical properties, and thermal diffusivity in a wide temperature range of a Cr – Mo steel (Russian Standard – 15KhM) as a candidate structural material for the manufacture of the cc-vessel body are presented. The low content of manganese and alloying with molybdenum and vanadium in 15KhM steel provides a finer grained structure and eliminates the steel’s tendency to temper brittleness.

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Effect of High Temperatures on the Mechanical Properties of the Weld Metal in the Welded Joint of Low-Carbon Low-Alloy Steel

Cited by 3 publications

References 6 publications

Mechanical properties of carbon steel under uniaxial static tension

Mechanical properties of carbon steel under uniaxial static tension

Influence of Overheating on High-Cycle Fatigue Characteristics of the Base Metal and Weld Metal of Low-Carbon Steel Welded Joints

Structure and properties of steels for manufacture of core catcher vessel of nuclear reactor

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