Nature of Microcracks in Ferritic Steels Occurred during Fracture under Conditions of Ductile-Brittle Transition Temperature Region

Кантор, М. М.; Воркачев, К. Г.; Солнцев, К. А.

doi:10.1134/s0020168518100096

Cited by 6 publications

(2 citation statements)

References 9 publications

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“…The more distorted the crystal lattice is, the lower the BC value. Unlike the plastic zone adjacent to the cleavage fracture, the metal of the plastic zone adjacent to the ductile fracture surface is strongly deformed [31]. The least deformed microstructure was observed in the local plastic zone near the internal surface of the split formed by the cleavage (Figure 6a, left side).…”

Section: Resultsmentioning

confidence: 99%

The Role of Splitting Phenomenon under Fracture of Low-Carbon Microalloyed X80 Pipeline Steels during Multiple Charpy Impact Tests

et al. 2022

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The ambiguity of the splitting effect on X80 low-carbon microalloyed pipeline steels’ tendency towards brittle fracture prompted an experimental study of impact toughness scattering based on multiple Charpy impact tests in a temperature range from 20 °C to −100 °C. A fractographic analysis of a large number of fractured samples was carried out. The relationships between impact toughness, deformability and splitting characteristics were studied. A number of common features of three X80 low-carbon microalloyed pipeline steel fractures were revealed. It was experimentally established that the reason for the scattering of the impact toughness values during completely ductile fracture of specimens, as well as during fracture accompanied by the splitting formation, is the local inhomogeneity of plastic properties. The higher the susceptibility to the formation of splits for a particular steel, the lower the impact toughness. Using the electron backscatter diffraction (EBSD) technique, an uneven distribution of local plasticity in the plastic zone of impact-fractured specimens was established. A comparative analysis of specimens with equal impact toughness values at different test temperatures makes it possible to identify the mechanism of negative splitting influence compensation by the increased plasticity of certain specimen.

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Section: Resultsmentioning

confidence: 99%

The Role of Splitting Phenomenon under Fracture of Low-Carbon Microalloyed X80 Pipeline Steels during Multiple Charpy Impact Tests

et al. 2022

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“…However, most of the studies on the tough-brittle transition temperature of materials have focused on the tough-brittle transition temperature of raw materials such as steel and asphalt [11][12][13], and the tough-brittle transition temperature of epoxy asphalt mixture has not been studied. Besides, throughout the research results, at this stage epoxy asphalt mixture cracking resistance design theory is not perfect, and the research tools need to be further improved.…”

Section: Introductionmentioning

confidence: 99%

Ductile–Brittle Transition Temperature of Epoxy Asphalt Concrete of Steel Bridge Deck Pavement Based on Impact Toughness

Zhang

Nie

Sha

et al. 2023

Advances in Materials Science and Engineering

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To solve the common low-temperature cracking problem of epoxy asphalt concrete pavement on the steel bridge deck, based on the principle of fracture mechanics and energy method, this paper puts forward the impact toughness as the evaluation index of crack resistance of epoxy asphalt concrete and verifies the feasibility of this index through theoretical analysis and experiment. At the same time, based on the study of impact toughness, the ductile–brittle transition temperature of epoxy asphalt concrete was explored, and the working state of epoxy asphalt concrete at different temperatures was mastered. The results show that the impact toughness is closely related to the J integral, which can better evaluate the crack resistance of epoxy asphalt mixture. The Boltzmann function can accurately reflect the relationship between impact toughness and temperature and can determine the ductile–brittle transition temperature and transition interval of epoxy asphalt concrete. Impact toughness and ductile–brittle transition temperature can be used as the evaluation index of crack resistance of epoxy asphalt concrete, which provides a new design idea for the study of crack resistance of epoxy asphalt concrete and the scope of engineering application.

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The microstructure of low carbon microalloyed steel and impact toughness scattering during fracture in ductile-to-brittle transition region

Кантор

Воркачев

Bozhenov

et al. 2020

Procedia Structural Integrity

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Nature of Microcracks in Ferritic Steels Occurred during Fracture under Conditions of Ductile-Brittle Transition Temperature Region

Cited by 6 publications

References 9 publications

The Role of Splitting Phenomenon under Fracture of Low-Carbon Microalloyed X80 Pipeline Steels during Multiple Charpy Impact Tests

The Role of Splitting Phenomenon under Fracture of Low-Carbon Microalloyed X80 Pipeline Steels during Multiple Charpy Impact Tests

Ductile–Brittle Transition Temperature of Epoxy Asphalt Concrete of Steel Bridge Deck Pavement Based on Impact Toughness

The microstructure of low carbon microalloyed steel and impact toughness scattering during fracture in ductile-to-brittle transition region

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