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

Farideh HajyAkbary; Jilt Sietsma; Roumen H. Petrov; Goro Miyamoto; Tadashi Furuhara; Maria Jesus Santofimia

doi:10.1016/j.scriptamat.2017.04.040

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

Farideh HajyAkbary, Jilt Sietsma, Roumen H. Petrov, Goro Miyamoto, Tadashi Furuhara, Maria Jesus Santofimia

Materials Design Division

Research output: Contribution to journal › Article › peer-review

25 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 language	English
Pages (from-to)	27-30
Number of pages	4
Journal	Scripta Materialia
Volume	137
DOIs	https://doi.org/10.1016/j.scriptamat.2017.04.040
Publication status	Published - 2017 Aug 1

Keywords

Microscopy and microanalysis techniques
Quenching and partitioning
Segregation

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

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10.1016/j.scriptamat.2017.04.040

Cite this

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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.",

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T1 - A quantitative investigation of the effect of Mn segregation on microstructural properties of quenching and partitioning steels

AU - HajyAkbary, Farideh

AU - Sietsma, Jilt

AU - Petrov, Roumen H.

AU - Miyamoto, Goro

AU - Furuhara, Tadashi

AU - Santofimia, Maria Jesus

PY - 2017/8/1

Y1 - 2017/8/1

N2 - 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.

AB - 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.

KW - Microscopy and microanalysis techniques

KW - Quenching and partitioning

KW - Segregation

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

Abstract

Keywords

ASJC Scopus subject areas

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