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A. Zavdoveev,P. Zok,V. Pozniakov,M. Rogante,T. Baudin,M. Heaton,A. Gaivoronskiy,S. Zhdanov,P. Acquier,T. Solomijchuk,V. Kostin1,M. Skoryk,I. Klochkov,S. Motrunich 대한금속ᆞ재료학회 2023 METALS AND MATERIALS International Vol.29 No.2
Thermomechanically cold processed (TMCP) steels with a high level of strength are actively used in various constructions. The high strength of the TMCP steels is acquired due to the formation of the fine-grained structure. Such steels have relativelylow carbon percentage. These greatly simplify the solution of the problem of improving the quality and reliability of metalstructures. At the same time this raises new questions in terms of the technology for welding such steels. In the first instance,it is conditioned by the complex behavior of the TMCP structure under the welding thermal cycle effect. The most importantproperty of the welded joint is yield stress (YS) which characterizes the workability of the whole joint. The estimation ofthe YS while developing the welding technology is a valuable task for design. This current research has made a complexinvestigation of the modern welding technique's effect on the behavior of the yield stress formation in TMCP steel weldedjoints. For progressive technology development, pulse arc welding was used.
Effect of Pulse Current GMAW on the Yield Stress of the S460M TMCP Steel Welded Joints
A. Zavdoveev,P. Zok,V. Pozniakov,M. Rogante,T. Baudin,M. Heaton,A. Gaivoronskiy,S. Zhdanov,P. Acquier,T. Solomijchuk,V. Kostin,M. Skoryk,I. Klochkov,S. Motrunich 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.3
Thermomechanically cold processed (TMCP) steels with a high level of strength are actively used in various constructions. The high strength of the TMCP steels is acquired due to the formation of the fine-grained structure. Such steels have relativelylow carbon percentage. These greatly simplify the solution of the problem of improving the quality and reliability of metalstructures. At the same time this raises new questions in terms of the technology for welding such steels. In the first instance,it is conditioned by the complex behavior of the TMCP structure under the welding thermal cycle effect. The most importantproperty of the welded joint is yield stress (YS) which characterizes the workability of the whole joint. The estimation ofthe YS while developing the welding technology is a valuable task for design. This current research has made a complexinvestigation of the modern welding technique's effect on the behavior of the yield stress formation in TMCP steel weldedjoints. For progressive technology development, pulse arc welding was used.
Anatoliy Zavdoveev,A. Len,E. Pashinska 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.3
Small angle neutron scattering was applied to steel produced by rolling with shear (RS) technology and compared to samplesproduced by standard technology (ST). Based on small angle neutron scattering measurements the morphology of the grainsand pores of RS steels were compared to those of the ST steels. The scattering in small scattering vector region showedanisotropy, attributed to the elongation of the pores; the pearlite lamellae distances along and perpendicular to the rollingdirections differed by a factor of 1.5. The results of the Small angle neutron scattering measurements were in accordancewith the electrical characteristics of the specimens. They showed smaller and less anisotropic average sizes of the cracksand nanopores for the RS samples than for the ST rods. This confirms the dynamic healing of the nanosized defects duringthe cold drawing of the RS rods. This fundamental result shows that during severe plastic deformation a cyclic process ofnucleation and healing of the nanovoids took place. However, during the standard deformation process only nucleation ofthe nanovoids is present.