Open AccessChange of magnetic properties of metal in the zone of stress concentrator
Author(s) -
L. V. Khajbullina
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/862/3/032103
Subject(s) - concentrator , materials science , magnetic field , scattering , tension (geology) , stress (linguistics) , field (mathematics) , condensed matter physics , optics , composite material , mechanics , physics , ultimate tensile strength , linguistics , philosophy , mathematics , quantum mechanics , pure mathematics
Studies show that there are certain problems in assessing the stress-strain state of structures by magnetic control methods, so it is necessary to carry out additional theoretical and experimental studies of magnetic parameters on standard samples from structural steels, which will help to reduce uncertainty of magnetic control results. In operation, dependence of intensity of own magnetic field of scattering in eight directions is established from concentrator of stresses at tension of cylindrical sample with artificially created concentrators of stresses in the form of overcooler with diameter of 2 mm from steel C 20 in elastic area. The analysis of the obtained dependencies revealed a change in the intensity distribution of the own magnetic field of metal scattering in the vicinity of the stress concentrator. In general, the distribution of the strength of the intrinsic magnetic field of the metal scattering in the zone of the stress concentrator tends to increase when the stresses are removed from the concentrator, but there are areas where the strength of the intrinsic magnetic field of the metal scattering is reduced when the stress is removed from the concentrator, which may indicate an intended fracture zone. There are no sharp changes in the intensity values of the own magnetic field of metal scattering at increase of tension load in the elastic region.