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Metals 2018, 8(8), 636; https://doi.org/10.3390/met8080636

Local Characterization of Precipitation and Correlation with the Prior Austenitic Microstructure in Nb-Ti-Microalloyed Steel by SEM and AFM Methods

Department for Materials Science and Engineering, Saarland University, 66123 Saarbrücken, Germany
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Received: 30 July 2018 / Revised: 8 August 2018 / Accepted: 8 August 2018 / Published: 13 August 2018
(This article belongs to the Special Issue Advances in Microalloyed Steels)
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Abstract

Precipitation is one of the most important influences on microstructural evolution during thermomechanical processing (TMCP) of micro-alloyed steels. Due to precipitation, pinning of prior austenite grain (PAG) boundaries can occur. To understand the mechanisms in detail and in relation to the thermomechanical treatment, a local characterization of the precipitation state depending on the microstructure is essential. Commonly used methods for the characterization, such as transmission electron microscopy (TEM) or matrix dissolution techniques, only have the advantage of local or statistically secured characterization. By using scanning electron microscopy (SEM) and atomic force microscopy (AFM) techniques, both advantages could be combined. In addition, in the present work a correlation of the precipitation conditions with the prior austenite grain structure for different austenitization states could be realized by Electron Backscatter Diffraction (EBSD) measurement and reconstruction methods using the reconstruction software Merengue 2. View Full-Text
Keywords: micro-alloyed steels; precipitations; Zener pinning; atomic force microscopy (AFM); precipitation-microstructure correlation; EBSD; reconstruction methods micro-alloyed steels; precipitations; Zener pinning; atomic force microscopy (AFM); precipitation-microstructure correlation; EBSD; reconstruction methods
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Eisenhut, L.; Fell, J.; Motz, C. Local Characterization of Precipitation and Correlation with the Prior Austenitic Microstructure in Nb-Ti-Microalloyed Steel by SEM and AFM Methods. Metals 2018, 8, 636.

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