<abstract xmlns="http://www.w3.org/1999/xhtml"><p>In the present study, microstructure of the ULC steel was investigated by using the X-ray diffraction (XRD), optical microscopy (OM) and electron back scattering diffraction (EBSD) analysis. The pure ferrite phase consisting of various crystalline orientations, e.g. (110) and (200) etc., existed in the ULC steel. Ultra-fine grains of ferrite were observed in the ND-TD cross-section (⊥ RD), meanwhile, typical lamina were seen in the ND-RD cross-section (// RD) of the steel sheet. Grain size of the annealed steel was observed to be coarser and equiaxed in all direction. According the EBSD results, intensities of the beneficial texture {111}&lt;001> increased in the annealed steel, but weakened in the cross-section that was parallel to rolling direction. Ratio of low-angle grain boundaries (1°&lt; LAGBs &lt; 15°) in the annealed steel was estimated as the higher value (93.1 %) than that in the cold-rolled steel (69.1 %).</p></abstract>

In the present study, microstructure of the ULC steel was investigated by using the X-ray diffraction (XRD), optical microscopy (OM) and electron back scattering diffraction (EBSD) analysis. The pure ferrite phase consisting of various crystalline orientations, e.g. (110) and (200) etc., existed in the ULC steel. Ultra-fine grains of ferrite were observed in the ND-TD cross-section (⊥ RD), meanwhile, typical lamina were seen in the ND-RD cross-section (// RD) of the steel sheet. Grain size of the annealed steel was observed to be coarser and equiaxed in all direction. According the EBSD results, intensities of the beneficial texture {111}<001> increased in the annealed steel, but weakened in the cross-section that was parallel to rolling direction. Ratio of low-angle grain boundaries (1°< LAGBs < 15°) in the annealed steel was estimated as the higher value (93.1 %) than that in the cold-rolled steel (69.1 %).

Microstructural Characterization of ULC Steel

Hanoi University of Science and Technology

Advances in Materials Science

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Microstructural Characterization of ULC Steel"}

In the present study, microstructure of the ULC steel was investigated by using the X-ray diffraction (XRD), optical microscopy (OM) and electron back scattering diffraction (EBSD) analysis. The pure ferrite phase consisting of various crystalline orientations, e.g. (110) and (200) etc., existed in the ULC steel. Ultra-fine grains of ferrite were observed in the ND-TD cross-section (⊥ RD), meanwhile, typical lamina were seen in the ND-RD cross-section (// RD) of the steel sheet. Grain size of the annealed steel was observed to be coarser and equiaxed in all direction. According the EBSD results, intensities of the beneficial texture {111} increased in the annealed steel, but weakened in the cross-section that was parallel to rolling direction. Ratio of low-angle grain boundaries (1°< LAGBs < 15°) in the annealed steel was estimated as the higher value (93.1 %) than that in the cold-rolled steel (69.1 %).

In the present study, microstructure of the ULC steel was investigated by using the X-ray diffraction (XRD), optical microscopy (OM) and electron back...

Microstructural Characterization of ULC Steel

Published Online: Apr 13, 2020

Page range: 71 - 81

DOI: https://doi.org/10.2478/adms-2020-0004

Keywords
ULC steel, microstructure, EBSD analysis, crystalline orientation, texture

© 2020 Cao-Son Nguyen et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Microstructural Characterization of ULC Steel

Published Online: Apr 13, 2020

Page range: 71 - 81

DOI: https://doi.org/10.2478/adms-2020-0004

KeywordsULC steel, microstructure, EBSD analysis, crystalline orientation, texture

© 2020 Cao-Son Nguyen et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
ULC steel, microstructure, EBSD analysis, crystalline orientation, texture