The Role of Splitting Phenomenon under Fracture of Low-Carbon Microalloyed X80 Pipeline Steels during Multiple Charpy Impact Tests
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 larg...
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| Format: | Article |
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MDPI AG
2022-06-01
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| Series: | Applied Mechanics |
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| Online Access: | https://www.mdpi.com/2673-3161/3/3/44 |
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| author | Matvey Matveevich Kantor Konstantin Grigorievich Vorkachev Vyacheslav Aleksandrovich Bozhenov Konstantin Aleksandrovich Solntsev |
| author_facet | Matvey Matveevich Kantor Konstantin Grigorievich Vorkachev Vyacheslav Aleksandrovich Bozhenov Konstantin Aleksandrovich Solntsev |
| author_sort | Matvey Matveevich Kantor |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T00:51:50Z |
| format | Article |
| id | doaj.art-6201f5e50242431c820e5cc552285cc6 |
| institution | Directory Open Access Journal |
| issn | 2673-3161 |
| language | English |
| last_indexed | 2024-03-10T00:51:50Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Mechanics |
| spelling | doaj.art-6201f5e50242431c820e5cc552285cc62023-11-23T14:49:52ZengMDPI AGApplied Mechanics2673-31612022-06-013374075610.3390/applmech3030044The Role of Splitting Phenomenon under Fracture of Low-Carbon Microalloyed X80 Pipeline Steels during Multiple Charpy Impact TestsMatvey Matveevich Kantor0Konstantin Grigorievich Vorkachev1Vyacheslav Aleksandrovich Bozhenov2Konstantin Aleksandrovich Solntsev3New Technologies of Metallic and Ceramic Materials Laboratory, A.A. Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences, 119334 Moscow, RussiaNew Technologies of Metallic and Ceramic Materials Laboratory, A.A. Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences, 119334 Moscow, RussiaNew Technologies of Metallic and Ceramic Materials Laboratory, A.A. Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences, 119334 Moscow, RussiaNew Technologies of Metallic and Ceramic Materials Laboratory, A.A. Baikov Institute of Metallurgy and Materials Science of Russian Academy of Sciences, 119334 Moscow, RussiaThe 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.https://www.mdpi.com/2673-3161/3/3/44impact toughnessscatteringsplittingfractographylocal plasticityEBSD |
| spellingShingle | Matvey Matveevich Kantor Konstantin Grigorievich Vorkachev Vyacheslav Aleksandrovich Bozhenov Konstantin Aleksandrovich Solntsev The Role of Splitting Phenomenon under Fracture of Low-Carbon Microalloyed X80 Pipeline Steels during Multiple Charpy Impact Tests Applied Mechanics impact toughness scattering splitting fractography local plasticity EBSD |
| title | The Role of Splitting Phenomenon under Fracture of Low-Carbon Microalloyed X80 Pipeline Steels during Multiple Charpy Impact Tests |
| title_full | The Role of Splitting Phenomenon under Fracture of Low-Carbon Microalloyed X80 Pipeline Steels during Multiple Charpy Impact Tests |
| title_fullStr | The Role of Splitting Phenomenon under Fracture of Low-Carbon Microalloyed X80 Pipeline Steels during Multiple Charpy Impact Tests |
| title_full_unstemmed | The Role of Splitting Phenomenon under Fracture of Low-Carbon Microalloyed X80 Pipeline Steels during Multiple Charpy Impact Tests |
| title_short | The Role of Splitting Phenomenon under Fracture of Low-Carbon Microalloyed X80 Pipeline Steels during Multiple Charpy Impact Tests |
| title_sort | role of splitting phenomenon under fracture of low carbon microalloyed x80 pipeline steels during multiple charpy impact tests |
| topic | impact toughness scattering splitting fractography local plasticity EBSD |
| url | https://www.mdpi.com/2673-3161/3/3/44 |
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