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Title

Analyzing the scale of the bainitic ferrite plates by XRD, SEM and TEM

AuthorsGarcía Mateo, Carlos ; Jiménez, José Antonio; López-Ezquerra, B.; Rementería, Rosalía; Morales-Rivas, Lucía; Kuntz, M.; García Caballero, Francisca
KeywordsPlate thickness
Microstructural characterization
Crystallite size
Bainite
Issue Date2016
PublisherElsevier
CitationMaterials Characterization 122: 83-89 (2016)
AbstractSince 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 0.7 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.
Publisher version (URL)http://dx.doi.org/10.1016/j.matchar.2016.10.023
URIhttp://hdl.handle.net/10261/143040
DOIhttp://dx.doi.org/10.1016/j.matchar.2016.10.023
Identifiersdoi: 10.1016/j.matchar.2016.10.023
issn: 1044-5803
Appears in Collections:(CENIM) Artículos
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