Open AccessDetailed characterization of complex banding in air-cooled bainitic steels
Author(s) -
Lucía Morales-Rivas,
H. Roelofs,
S. Hasler,
C. Garcı́a-Mateo,
Francisca G. Caballero
Publication year - 2015
Publication title -
journal of mining and metallurgy. section b, metallurgy/journal of mining and metallurgy. section b, metallurgy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.42
H-Index - 20
eISSN - 2217-7175
pISSN - 1450-5339
DOI - 10.2298/jmmb140331008m
Subject(s) - microstructure , materials science , electron backscatter diffraction , scanning electron microscope , characterization (materials science) , diffraction , electron microscope , spectroscopy , crystallography , metallurgy , matrix (chemical analysis) , optical microscope , composite material , chemistry , optics , nanotechnology , physics , quantum mechanics
The presence of banding in a hot-rolled air-cooled bainitic steel has been thoroughly characterized. The banded microstructure was observed due to distinctive sensitivities to the etching agent. Microstructural and crystallographic studies by means of Scanning Electron Microscopy and Electron Backscatter Diffraction did not reveal any substantial differences between bands and matrix. However, solute segregation of some alloying elements was detected by Wavelength- Dispersive Spectroscopy, being found that bands are enriched in Cr, Mo and Si and depleted in Mn. Finally, a set of theoretical calculations suggested that the solidification mode is responsible for such unusual partitioning behavior, which is beneficial in terms of the bainitic transformation