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

Farideh Hajy Akbary, Jilt Sietsma, Roumen H. Petrov, Goro Miyamoto, Tadashi Furuhara, Maria Santofimia Navarro

Research output: Contribution to journalArticleScientificpeer-review

20 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)27-30
JournalScripta Materialia
Volume137
DOIs
Publication statusPublished - 2017

Keywords

  • Microscopy and microanalysis techniques
  • Quenching and partitioning
  • Segregation

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