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Physics of Metals and Metallography
Erschienen in: Physics of Metals and Metallography 1/2020

01.01.2020 | STRUCTURE, PHASE TRANSFORMATIONS, AND DIFFUSION

Nucleation and Growth of Precipitates in a V-Microalloyed Steel According to Physical Theory and Experimental Results

verfasst von: S. F. Medina, P. Valles, J. Calvo, Jose M. Cabrera

Erschienen in: Physics of Metals and Metallography | Ausgabe 1/2020

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Abstract—

Using a theoretical model, the nucleus number and nucleation time were determined for a V‑microalloyed steel. The calculated data has made it possible to plot the nucleus number vs. temperature, nucleation critical time vs. temperature, and precipitate critical radius vs. temperature. The nucleus number was calculated by integration of the nucleation rate expression. On the other hand, an experimental study was performed and the nucleation time vs. temperature was plotted (PTT diagram), thus allowing a comparison between the theoretical values and experimental results. It has been found that the growth of precipitates during precipitation obeys a quadratic growth equation and not a cubic coalescence equation. The experimentally determined growth rate coincides with the theoretically predicted growth rate. The experimental nucleation time is longer than the calculated time due to conceptual differences.
Vorheriger Artikel Effect of Heat Treatment on the Magnetoimpedance of Soft Magnetic Co68.5Fe4Si15B12.5 Amorphous Ribbons
Nächster Artikel Structural-Phase Evolution of Quenched Low-Activation Ferritic–Martensitic Steel in Dependence of the Temperature of Isothermal Holding

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Metadaten
Titel
Nucleation and Growth of Precipitates in a V-Microalloyed Steel According to Physical Theory and Experimental Results
verfasst von
S. F. Medina
P. Valles
J. Calvo
Jose M. Cabrera
Publikationsdatum
01.01.2020
Verlag
Pleiades Publishing
Erschienen in
Physics of Metals and Metallography / Ausgabe 1/2020
Print ISSN: 0031-918X
Elektronische ISSN: 1555-6190
DOI
https://doi.org/10.1134/S0031918X2001010X

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