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The effect of constrained groove pressing on grain size, dislocation density and electrical resistivity of low carbon steel

Khodabakhshi, F ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matdes.2011.02.032
  3. Abstract:
  4. In this research, constrained groove pressing (CGP) technique is used for imposing severe plastic deformation (SPD) on the low carbon steel sheets. Using transmission electron microscopy (TEM), X-ray diffraction (XRD) and optical microscopy, the microstructural characteristics of produced sheets are investigated. The results show that CGP process can effectively refine the coarse-grained structure to an ultrafine grain range. Dislocation densities of the ultrafine grained low carbon steel sheets are quantitatively calculated and it is found that the CGP can effectively enhance the dislocation density of the sheets. Measurements of their electrical resistivity values show that microstructure refinement and increasing the dislocation density can efficiently increase the electrical resistivity of the CGPed sheets up to ∼100%
  5. Keywords:
  6. A. Ferrous metals and alloys ; C. Forming ; Coarse-grained structure ; Constrained groove pressing ; Dislocation densities ; E. Electrical ; Electrical resistivity ; Ferrous metals and alloys ; Grain size ; Microstructural characteristics ; Microstructure refinement ; Severe plastic deformations ; TEM ; Ultra fine grain ; Ultrafine grained low carbon steels ; Aluminum sheet ; Electric conductivity ; Iron ; Low carbon steel ; Metallurgy ; Optical microscopy ; Transmission electron microscopy ; X ray diffraction ; X ray diffraction analysis ; Steel sheet
  7. Source: Materials and Design ; Volume 32, Issue 6 , 2011 , Pages 3280-3286 ; 02641275 (ISSN)
  8. URL: http://www.sciencedirect.com/science/article/pii/S0261306911001105