期刊
MATERIALS & DESIGN
卷 32, 期 6, 页码 3280-3286出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2011.02.032
关键词
Ferrous metals and alloys; Forming; Electrical
资金
- research board of Sharif University of Technology
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 similar to 100%. (C) 2011 Elsevier Ltd. All rights reserved.
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