Abstract
The analysis and consideration of the influence of the main factors on the damage of welded metal structures during long-term operation. The relationship between the strength of the magnetic field of the Hр scattering and structural changes in structural steels that occur during cold plastic deformation to different degrees is established. It is shown that at small degrees of deformation, the change in the magnetic parameter Hр is large. As they increase, the HP value decreases and tends to the values of the Earth's magnetic field. The data of microstructural analysis of the metal of structural steels are in good agreement with the results of the passive ferrosonde method of control. A method for evaluating the effect of cold plastic deformation on the magnetic properties of metal in structural steels has been developed.
Highlights
The technical diagnosis of welded metal structures (MS) confirms that the most common cause of damage and, as a result, failure is the appearance of fatigue cracks in welded joints with structural heterogeneity
A negative impact on the performance of elements of welded metal structures is exerted by local zones of stress concentration (SC) that arise during long-term operation, where plastic deformation is observed to one degree or another
A relationship has been established between the scattering magnetic field strength Нр and the microstructure change in low-carbon steel 08PS and low-alloy steels 09G2S and 10HSND during fractional rolling to different degrees of deformation
Summary
The technical diagnosis of welded metal structures (MS) confirms that the most common cause of damage and, as a result, failure is the appearance of fatigue cracks in welded joints with structural heterogeneity (the presence of a cast structure in the weld, coarse-grained and fine-grained in the heat-affected zone). One of the practical methods for the formation of a microstructure with a given grain size should include recrystallization annealing carried out after preliminary cold plastic deformation of the metal. By changing the degree of deformation and the temperature of the subsequent recrystallization annealing, one can obtain a given grain size [6].
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
