2022 Volume 63 Issue 735 Pages 47-51
To elucidate the material characteristics of high-tensile-strength steels HT980 and HT1180, the respective relationships between crystallographic orientations and microstructures were examined, along with bending. Bending apparatus obtained from TSL Solutions Co., Ltd. was used to study bending angles of as-received materials at intervals of 10° from 180° to 140°, and from 180° to 100° for laser-irradiated materials. Bending tests were performed in a field emission scanning electron microscope (FE-SEM) apparatus while observing the behaviors. The texture distributions in steel sample were analyzed using orientation imaging microscopy (OIM) software. Some analytical results related to inverse pole figure (IPF) maps, kernel average misorientation (KAM) maps, and the orientation distribution function (ODF) were obtained by electron backscatter diffraction (EBSD) analyses. Results show that the bending ability depends strongly on the KAM value.
