Austenite Reverse Transformation in a Q&P Route of Mn and Ni Added Steels

Maribel Arribas, Teresa Gutiérrez, Eider Del Molino, Artem Arlazarov, Irene De Diego-Calderón, David Martin, Daniele De Caro, Sudhindra Ayenampudi, Maria Jesus Santofimia

    Research output: Contribution to journalArticleScientificpeer-review

    11 Citations (Scopus)
    71 Downloads (Pure)

    Abstract

    In this work, four low carbon steels with different contents of Mn and Ni were heat treated by quenching and partitioning (Q&P) cycles where high partitioning temperatures, in the range of 550 °C–650 °C, were applied. In order to elucidate the effect of applying these high partitioning temperatures with respect to more common Q&P cycles, the materials were also heat treated considering a partitioning temperature of 400 °C. The microstructure evolution during the Q&P cycles was studied by means of dilatometry tests. The microstructural characterization of the treated materials revealed that austenite retention strongly depended on the alloy content and partitioning conditions. It was shown that the occurrence of austenite reverse transformation (ART) in the partitioning stage in some of the alloys and conditions was a very effective mechanism to increase the austenite content in the final microstructure. However, the enhancement of tensile properties achieved by the application of high partitioning temperature cycles was not significant.
    Original languageEnglish
    Article number862
    Number of pages17
    JournalMetals
    Volume10
    Issue number7
    DOIs
    Publication statusPublished - 2020

    Keywords

    • quenching and partitioning
    • austenite reverse transformation
    • Mn and Ni influence
    • austenite stabilization

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