摘要
The excellent deep drawability of interstitial free steel （IF steel） is closely related to its texture formed during recrystallization. The nucleation process of cold rolled IF steel at the early stage of recrystallization was inves-tigated by electron back scattered diffraction （EBSD）. The characteristics of the microstructure after deformation and the orientation of nucleation were observed. The results show that the deformed microstructure with 80% reduction could be subdivided into two groups. These two types of microstructure were characterized by their orientation and internal local misorientations. The nuclei with γ-orientation preferred to form in deformed bands with γ-orientation and at the boundaries between deformed grains with different orientations. The recrystallized grains with { 111 } 〈 110〉 orientation appeared firstly in deformed matrix with {111} 〈112〉 orientation and consumed the matrix with {111 } 〈112〉 to grow up, while the recrystallized grains with {111} 〈112〉 orientation were observed secondly in de-formed matrix with { 111 }〈110〉 orientation and consumed matrix with { 111} 〈110〉 to grow up.
The excellent deep drawability of interstitial free steel （IF steel） is closely related to its texture formed during recrystallization. The nucleation process of cold rolled IF steel at the early stage of recrystallization was inves-tigated by electron back scattered diffraction （EBSD）. The characteristics of the microstructure after deformation and the orientation of nucleation were observed. The results show that the deformed microstructure with 80% reduction could be subdivided into two groups. These two types of microstructure were characterized by their orientation and internal local misorientations. The nuclei with γ-orientation preferred to form in deformed bands with γ-orientation and at the boundaries between deformed grains with different orientations. The recrystallized grains with { 111 } 〈 110〉 orientation appeared firstly in deformed matrix with {111} 〈112〉 orientation and consumed the matrix with {111 } 〈112〉 to grow up, while the recrystallized grains with {111} 〈112〉 orientation were observed secondly in de-formed matrix with { 111 }〈110〉 orientation and consumed matrix with { 111} 〈110〉 to grow up.
基金
Sponsored by National Key Technology Research and Development Program of China(2011BAE13B03)
National Natural Science Foundation of China(50231030)
Scientific and Technological Project in Liaoning Province of China(2011220020)
