Microstructural and textural characterization of a hot-rolled IF steel
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The present paper reports the experimental results on the microstructural and textural characterization of a hot-rolled IF steel. The IF steel was hot-rolled in multiple passes in the austenitic field (1,070 °C) followed by air-cooling. SEM, TEM, and LOM were used to image the microstructure of the material. The global texture was determined by X-ray diffraction (XRD) technique. The mesotexture of selected regions was investigated by electron backscatter diffraction (EBSD). Results show the presence of a diffuse (nearly random) and weak texture in the hot-band that consists of recrystallized polygonal grains and subgrains. The fraction of boundaries with misorientations comprised in the interval 2° ≤ ψ < 15° was found to be lower than 5%. It can be concluded that these low angle boundaries and the presence of subgrains can be associated to the existence of a few areas softened by recovery during or after hot rolling in austenitic field.
KeywordsFerrite Austenite Orientation Distribution Function Recrystallization Texture Rolling Plane
The authors acknowledge the financial support provided by FAPESP and are grateful to IPEN (MSc. Marilene Serna) for the texture measurements, and to the Universidade de São Paulo (Dr.-Ing. A.F. Padilha) for allowing the use of the EBSD facilities. Thanks are due to Professor Paulo Rangel Rios (EEIMVR/UFF, Brazil) for going through the manuscript meticulously.
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