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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.