Role of Crystallographic Textures on Failure Behavior in HSLA Grade-420 Steel During Cold Rolling |
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Authors: | Mohammad Masoumi Cleiton Carvalho Silva Igor Anjos Lemos Luis Flavio Gaspar Herculano Hamilton Ferreira Gomes de Abreu |
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Affiliation: | 1.Materials Characterization Laboratory, Department of Materials and Metallurgical Engineering, Building 729,Federal University of Ceará (UFC),Fortaleza,Brazil;2.Welding Engineering Laboratory, Department of Materials and Metallurgical Engineering, Building 715,Federal University of Ceará (UFC),Fortaleza,Brazil |
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Abstract: | The microstructural and textural evolution was analyzed during rolling at room temperature to obtain detailed information about the failure behavior in HSLA grade-420 steel. Electron backscatter diffraction measurements were carried out in both non-cracked and cracked areas after cold rolling to find a correlation between microstructural parameters (i.e., grain orientation, grain boundary characteristics and Taylor factor) and crack propagation. The results showed that the crack tended to propagate along grains oriented with {001} planes parallel to the normal direction with high Taylor factor value. The special boundaries associated with the {111}, {110} and {221} planes were indicated as crack resistance, while ∑ 5, 13a and 17a, which related to the {001} planes, were crack-susceptible. Transgranular cracking was subjected within grains with high Taylor factor, while mismatch in Taylor factor between neighboring grains could provide an easy path for intergranular crack propagation. |
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