DEFORMATION AND ENERGY PARAMETERS OF FRACTURE OF STEEL OF THE MAIN GAS PIPELINE
1
Ternopil Ivan Pul’uj National Technical University, 56 Ruska Str., Ternopil 46001, Ukraine
2
Institute of Strength Physics and Materials Science SB RAS, 2/4 pr. 2 Akademicheskii, Tomsk 634021, Russia
3
Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia
4
Technical University of Košice, Department of Technology and Materials, Košice, Slovakia
Publication date: 2015-11-27
Adv. Sci. Technol. Res. J. 2015; 9(28):40-46
KEYWORDS
ABSTRACT
By example of steel 17G1S, the regularities in the impact fracture of Charpy specimens at normal and low temperatures are described. The relationship between the energy parameters of fracture (impact toughness) and the deformation response of the material (the height of shear lips) of the specimens from the pipe steel is established. The micromechanisms of impact fracture of the material are described. At 20 °C and –30 °C, focal splitting of the material was observed on the fracture surface of specimens; at –60 °C, the material failed in a brittle manner by the mechanism of cleavage.
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