Effects of Mg-Al-O-Mn-S inclusion on the nucleation of acicular ferrite in magnesium-containing low-carbon steel

Chi Kang Lin; Yan Chi Pan; Yen Hao Frank Su; Guan Ru Lin; Weng Sing Hwang; Jui Chao Kuo

doi:10.1016/j.matchar.2018.05.005

Effects of Mg-Al-O-Mn-S inclusion on the nucleation of acicular ferrite in magnesium-containing low-carbon steel

Chi Kang Lin, Yan Chi Pan, Yen Hao Frank Su, Guan Ru Lin, Weng Sing Hwang, Jui Chao Kuo

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59 Citations (Scopus)

Abstract

The effects of inclusion size and chemical composition on acicular ferrite (AF) nucleation and possible nucleation mechanisms were discussed. With the use of low-carbon structure steel containing 13 ppm Mg, the chemical composition and size of inclusions were quantified by scanning electron microscopy combined with an energy dispersive spectroscopy system. Results showed that the complex inclusions MgO-MnS and MgO-Al₂O₃-MnS are the most effective inclusions for inducing AF nucleation in Mg-containing A36, and their probabilities of AF nucleation are 35.8% and 41.4%, respectively. Moreover, the inclusion size in the range of 1–2 μm exhibits the most remarkable ability to induce AF formation. AF nucleates at the interface of MgO and MgO-Al₂O₃ because of the low lattice misfit with AF. Complex inclusions, such as MgO-MnS and MgO-Al₂O₃-MnS, present a better ability of inducing AF formation than that of MnS due to the Mn-depleted zone.

Original language	English
Pages (from-to)	318-327
Number of pages	10
Journal	Materials Characterization
Volume	141
DOIs	https://doi.org/10.1016/j.matchar.2018.05.005
Publication status	Published - 2018 Jul

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Effects of Mg-Al-O-Mn-S inclusion on the nucleation of acicular ferrite in magnesium-containing low-carbon steel",

abstract = "The effects of inclusion size and chemical composition on acicular ferrite (AF) nucleation and possible nucleation mechanisms were discussed. With the use of low-carbon structure steel containing 13 ppm Mg, the chemical composition and size of inclusions were quantified by scanning electron microscopy combined with an energy dispersive spectroscopy system. Results showed that the complex inclusions MgO-MnS and MgO-Al2O3-MnS are the most effective inclusions for inducing AF nucleation in Mg-containing A36, and their probabilities of AF nucleation are 35.8% and 41.4%, respectively. Moreover, the inclusion size in the range of 1–2 μm exhibits the most remarkable ability to induce AF formation. AF nucleates at the interface of MgO and MgO-Al2O3 because of the low lattice misfit with AF. Complex inclusions, such as MgO-MnS and MgO-Al2O3-MnS, present a better ability of inducing AF formation than that of MnS due to the Mn-depleted zone.",

author = "Lin, {Chi Kang} and Pan, {Yan Chi} and Su, {Yen Hao Frank} and Lin, {Guan Ru} and Hwang, {Weng Sing} and Kuo, {Jui Chao}",

note = "Funding Information: The authors would like to thank China Steel Corporation and the Ministry of Science and Technology under MOST 106-2622-8-006-001 for supporting this study. Funding Information: The authors would like to thank China Steel Corporation and the Ministry of Science and Technology under MOST 106-2622-8-006-001 for supporting this study. Publisher Copyright: {\textcopyright} 2018 Elsevier Inc.",

year = "2018",

month = jul,

doi = "10.1016/j.matchar.2018.05.005",

language = "English",

volume = "141",

pages = "318--327",

journal = "Materials Characterization",

issn = "1044-5803",

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T1 - Effects of Mg-Al-O-Mn-S inclusion on the nucleation of acicular ferrite in magnesium-containing low-carbon steel

AU - Lin, Chi Kang

AU - Pan, Yan Chi

AU - Su, Yen Hao Frank

AU - Lin, Guan Ru

AU - Hwang, Weng Sing

AU - Kuo, Jui Chao

N1 - Funding Information: The authors would like to thank China Steel Corporation and the Ministry of Science and Technology under MOST 106-2622-8-006-001 for supporting this study. Funding Information: The authors would like to thank China Steel Corporation and the Ministry of Science and Technology under MOST 106-2622-8-006-001 for supporting this study. Publisher Copyright: © 2018 Elsevier Inc.

PY - 2018/7

Y1 - 2018/7

N2 - The effects of inclusion size and chemical composition on acicular ferrite (AF) nucleation and possible nucleation mechanisms were discussed. With the use of low-carbon structure steel containing 13 ppm Mg, the chemical composition and size of inclusions were quantified by scanning electron microscopy combined with an energy dispersive spectroscopy system. Results showed that the complex inclusions MgO-MnS and MgO-Al2O3-MnS are the most effective inclusions for inducing AF nucleation in Mg-containing A36, and their probabilities of AF nucleation are 35.8% and 41.4%, respectively. Moreover, the inclusion size in the range of 1–2 μm exhibits the most remarkable ability to induce AF formation. AF nucleates at the interface of MgO and MgO-Al2O3 because of the low lattice misfit with AF. Complex inclusions, such as MgO-MnS and MgO-Al2O3-MnS, present a better ability of inducing AF formation than that of MnS due to the Mn-depleted zone.

AB - The effects of inclusion size and chemical composition on acicular ferrite (AF) nucleation and possible nucleation mechanisms were discussed. With the use of low-carbon structure steel containing 13 ppm Mg, the chemical composition and size of inclusions were quantified by scanning electron microscopy combined with an energy dispersive spectroscopy system. Results showed that the complex inclusions MgO-MnS and MgO-Al2O3-MnS are the most effective inclusions for inducing AF nucleation in Mg-containing A36, and their probabilities of AF nucleation are 35.8% and 41.4%, respectively. Moreover, the inclusion size in the range of 1–2 μm exhibits the most remarkable ability to induce AF formation. AF nucleates at the interface of MgO and MgO-Al2O3 because of the low lattice misfit with AF. Complex inclusions, such as MgO-MnS and MgO-Al2O3-MnS, present a better ability of inducing AF formation than that of MnS due to the Mn-depleted zone.

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Effects of Mg-Al-O-Mn-S inclusion on the nucleation of acicular ferrite in magnesium-containing low-carbon steel

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