Correlative analysis of interaction between recrystallization and precipitation during sub-critical annealing of cold-rolled low-carbon V and Ti–V bearing microalloyed steels

Ishwar Kapoor, Yongjun Lan, Arjan Rijkenberg, G. West, Zushu Li, Vit Janik

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    Abstract

    In this paper a new insight into fundamentals of static recrystallization, precipitation and their interaction during sub-critical annealing of three cold-rolled low-carbon microalloyed steel grades is presented. The grades under investigation are a base grade containing V as a microalloying element, a Ti + grade containing Ti as microalloying element added into the base grade, and a Ti + Mn + grade containing additional Mn added into the Ti + grade. The cold-rolled steels are sub-critically annealed inside a muffle furnace to simulate industrial continuous annealing parameters in order to investigate the interaction between recrystallization and precipitation across transient stages of the annealing process as a function of temperature and time. The Zener pinning of precipitates and solute drag force of Mn on the recrystallization process are calculated and compared with measured values obtained from experimental studies on the recrystallization kinetics. Results suggest that the recrystallization kinetics is fastest in the base grade. For the Ti + grade, fine (<15 nm) (Ti,V)(C/N) particles retard the recrystallization kinetics. For the Ti+ and Ti + Mn + grades, solute drag effect of Mn solute atoms for dwell time longer than 2 min at annealing temperature of 800 °C is negligible.

    Original languageEnglish
    Article number139381
    JournalMaterials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
    Volume785
    Early online date15 Apr 2020
    DOIs
    Publication statusPublished - 21 May 2020

    Bibliographical note

    NOTICE: this is the author’s version of a work that was accepted for publication in Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing, 785, (2020) DOI: 10.1016/j.msea.2020.139381

    © 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

    Funder

    EPSRC (EP/N011368/1)

    Keywords

    • Annealing
    • Recovery
    • Recrystallization
    • Microalloyed steel
    • Precipitation
    • Solute drag

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