Effect of Nb and V in the Development of Texture and Plastic Strain Ratio in Low Carbon Microalloyed Steels Produced by A.S.T. Technology

Effect of Coiling Temperature on Formability and Mechanical Properties of Mild Low Carbon and HSLA Steels Processed by Thin Slab Casting and Direct Rolling

“…ODFs are the results of Electron-Back-Scattering-Diffraction (EBSD) experiments over a 750ϫ300 mm area, with a 6 mm 2 resolution and a working tension of 20 kV for the SEM electron beam, as reported in some previous papers. 6,7,9) The TEM observations have been performed on the different steel grades after the electrolytic thickening and applying a working voltage of 200 kV for the TEM electron beam. The average investigated area for each sample is of 0.9 mm 2 .…”

“…In this study these experimental parameters measured according to the respective standard test methods 9) have been applied to reach a satisfactory characterization of the steel properties as a function of the adopted coiling temperature. The strain aging properties of the strip have been also considered, since these phenomena can be detrimental but also exploitable along the technological route applied to the steel, particularly for the possibility to obtain the bake hardening during the processing of the strip (i.e.…”

“…Results for crystallographic textures analysis after EBSD experiments are discussed in detail in some previous studies 7,9) and in literature are also summarized some fundamental aspects, mainly related to the macroscopic behavior of the material. 14,15) For all the investigated steels the texture components derived from the recrystallization of austenite stand out, also in the case of the microalloyed steels, where elements like vanadium and mostly niobium are effective in retarding the kinetics of the phase transformation.…”

“…The formability of metal sheet is strictly influenced by microstructure and it can be characterized through the strain hardening exponent n, the plastic strain ratio r and the strain rate sensitivity coefficient m 9) ; information about the straining behavior during the plastic deformation of the …”