Exploring the microstructure and tensile properties of cold-rolled low and medium carbon steels after ultrafast heating and quenching

F. M. Castro Cerda*, B. Schulz, D. Celentano, A. Monsalve, I. Sabirov, R. H. Petrov

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    13 Citations (Scopus)

    Abstract

    The aim of the present study is to evaluate the impact of heating rate on the microstructure and tensile properties of cold-rolled low and medium carbon steels. For this purpose, cold-rolled low and medium carbon steels were subjected to short peak-annealing experiments at 900 and 1100 °C under three heating rates (10, 450 and 1500 °C/s). The microstructure reveals a mixture of phases and microconstituents (ferrite, bainite, and as-quenched martensite) which are related to the carbon heterogeneities in austenite. The microstructural characterization suggests that the grain refinement achieved after ultrafast heating has a minor effect on the yield and ultimate tensile strength, compared to the relative microstructural distribution. It is suggested that the interplay of various strengthening mechanisms in samples subjected to ultrafast heating rates are responsible for the observed increase in strength and ductility.

    Original languageEnglish
    Pages (from-to)509-516
    JournalMaterials Science and Engineering A
    Volume745
    DOIs
    Publication statusPublished - 2019

    Keywords

    • Martensite
    • Mechanical properties
    • Steel
    • Ultrafast heating

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