Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5454811 | Materials Characterization | 2016 | 7 Pages |
Abstract
Since the major strengthening mechanisms in nanocrystalline bainitic steels arise from the exceptionally small size of the bainitc ferrite plate, accurate determination of this parameter is fundamental for quantitative relating the microstructure to the mechanical properties. In this work, the thickness of the bainitic ferrite subunits obtained by different bainitic heat treatments was determined in two steels, with carbon contents of 0.3 and 0.7Â wt.%, from SEM and TEM micrographs. As these measurements were made on 2D images taken from random sections, the method includes some stereological correction factors to obtain accurate information. Finally, the determined thicknesses of bainitic ferrite plates were compared with the crystallite size calculated from the analysis of X-ray diffraction peak broadening. Although in some case the values obtained for crystallite size and plate thickness can be similar, this study confirms that indeed they are two different parameters.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Carlos Garcia-Mateo, Jose A. Jimenez, Belen Lopez-Ezquerra, Rosalia Rementeria, Lucia Morales-Rivas, Matthias Kuntz, Francisca G. Caballero,