The kinetics of formation and decomposition of austenite in relation to carbide morphology

Henrique Duarte Alvarenga*, Nele Van Steenberge, Jilt Sietsma, Herman Terryn

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    1 Citation (Scopus)

    Abstract

    The effect of the carbide morphology on the kinetics of austenite formation and its decomposition was investigated by a combination of measurements of austenite fraction by dilatometry and metallography. These measurements show that coarse carbide morphology is generated by fast cooling through the early stages of eutectoid transformation, enabling fast precipitation of pro-eutectoid ferrite, followed by slow cooling during the final stages of transformation, during the precipitation of carbides. Additionally, a strong influence of the morphology of carbides on the kinetics of austenite formation is observed. The presence of coarse carbides can determine the rate of austenite formation during intercritical annealing as a result of its slow dissolution kinetics.

    Original languageEnglish
    Pages (from-to)828-840
    JournalMetallurgical and Materials Transactions A - Physical Metallurgy and Materials Science
    Volume48
    Issue number2
    DOIs
    Publication statusPublished - 2017

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