Effect of re-austenitization on the transformation texture inheritance

17th International Conference on Textures of Materials

材料科学;物理学

Kaijalainen, A.^1 ; Suikkanen, P.^2 ; Porter, D.A.^1

Centre for Advanced Steels Research, Materials Engineering, University of Oulu, Finland^1

Ruukki Metals Oy, Raahe, Finland^2

关键词: Finish rolling temperature;    Martensitic microstructure;    Martensitic structures;    Recrystallization temperatures;    Rolling reduction;    Texture components;    Transformation textures;    Ultrahigh strength;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/82/1/012058/pdf
DOI  :  10.1088/1757-899X/82/1/012058

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Bainitic-martensitic microstructures produced by direct quenching austenite subjected to different degrees of pancaking have been re-austenitized and quenched to fully martensitic structures in order to investigate the effect of prior texture on the final martensite texture. Three different prior austenite pancaking states varying from convex-like to highly pancaked were investigated using an ultrahigh-strength strip steel hot rolled with various finish rolling temperatures followed by direct quenching. Microstructures were characterized using FESEM and transformation texture analysed using FESEM-EBSD at the strip surface, quarter- thickness and mid-thickness positions. The results show that an increase in rolling reduction below the non-recrystallization temperature increases the intensities of ∼{554}αand ∼{112}αtexture components in the ferrite along the strip mid-thickness and of the ∼{112}αcomponent at the surface. The re-austenitization of the materials at 910°C for 30 min led to an inheritance of the same components from the parent specimens, but also increased the intensity of {001}α, {110}αand {011}αcomponents.