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

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

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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.

Original language	English
Pages (from-to)	27-30
Journal	Scripta Materialia
Volume	137
DOIs	https://doi.org/10.1016/j.scriptamat.2017.04.040
Publication status	Published - 2017

Keywords

Microscopy and microanalysis techniques
Quenching and partitioning
Segregation

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10.1016/j.scriptamat.2017.04.040

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title = "A quantitative investigation of the effect of Mn segregation on microstructural properties of quenching and partitioning steels",

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.",

keywords = "Microscopy and microanalysis techniques, Quenching and partitioning, Segregation",

author = "{Hajy Akbary}, Farideh and Jilt Sietsma and Petrov, {Roumen H.} and Goro Miyamoto and Tadashi Furuhara and {Santofimia Navarro}, Maria",

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language = "English",

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

AU - Hajy Akbary, Farideh

AU - Sietsma, Jilt

AU - Petrov, Roumen H.

AU - Miyamoto, Goro

AU - Furuhara, Tadashi

AU - Santofimia Navarro, Maria

PY - 2017

Y1 - 2017

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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U2 - 10.1016/j.scriptamat.2017.04.040

DO - 10.1016/j.scriptamat.2017.04.040

M3 - Article

AN - SCOPUS:85019024187

SN - 1359-6462

VL - 137

SP - 27

EP - 30

JO - Scripta Materialia

JF - Scripta Materialia

ER -

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

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Keywords

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