Elsevier

Scripta Materialia

Volume 137, August 2017, Pages 27-30
Scripta Materialia

Regular article
A quantitative investigation of the effect of Mn segregation on microstructural properties of quenching and partitioning steels

https://doi.org/10.1016/j.scriptamat.2017.04.040Get rights and content

Abstract

Quenching and partitioning (Q&P) process of a 0.3C-1.3Si-3.2Mn (wt%) steel with Mn segregation is studied experimentally and theoretically. During initial quenching a higher fraction of martensite forms in Mn-poor regions compared to Mn-rich regions. In the partitioning process, austenite in Mn-poor regions is surrounded with a higher fraction of martensite than austenite in Mn-rich regions and therefore receives a larger amount of carbon. When carbon partitioning is not sufficient to stabilize austenite, a higher fraction of martensite forms, during final quenching, in Mn-poor regions. Lowering the quenching temperature in the Q&P process reduces inhomogeneity in the distribution of phases.

References (16)

  • J.G. Speer et al.

    Acta Mater.

    (2003)
  • D.V. Edmonds et al.

    Mater. Sci. Eng. A

    (2006)
  • M.J. Santofimia et al.

    Scr. Mater.

    (2008)
  • M.J. Santofimia et al.

    Acta Mater.

    (2009)
  • Y. Toji et al.

    Acta Mater.

    (2015)
  • F. HajyAkbary et al.

    Acta Mater.

    (2016)
  • F. HajyAkbary et al.

    Mater. Sci. Eng. A

    (2016)
  • D.P. Koistinen et al.

    Acta Metal.

    (1959)
There are more references available in the full text version of this article.

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