Effect of copper on tensile properties and grain-refinement of steel and its relation to precipitation behavior

Setuo Takaki, Masaaki Fujioka, Shuji Aihara, Yasunobu Nagataki, Takako Yamashita, Naoyuki Sano, Yoshitaka Adachi, Masahiro Nomura, Hiroshi Yaguchi

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

Progress of Ferrous Nano-Metal Project is introduced in the present paper. In the project, maximum use of copper clusters and precipitates is pursued for achieving better strength-ductility balance than that of conventional high-tensile strength steels. Fundamental aspect of clustering and precipitation of Cu in Fe-Cu alloys was studied using Optical Tomographic Atom-Probe (OTAP). It was found that Cu precipitation during aging was enhanced by plastic deformation. The observed Cu precipitation behavior was well related to the age-hardening behavior, that is, aging started at lower temperature and maximum hardness was higher for plastically deformed and aged ferrite. Aging behavior and associated tensile properties were further examined for Fe-C-Mn-Cu martensitic steel. Higher value of tensile strength times elongation was achieved in Fe-C-Mn-Cu steel than Fe-C-Mn steel. Finally, effect of Cu precipitation on grain-refinement of ferrite was studied for Fe-C-Mn-Cu steel. Ferrite grain smaller than 1 μm was obtained in both processes of strain-assisted ferrite transformation from heavily deformed austenite and dynamic recrystallization of heavily deformed ferrite. Ferrite grain size was found to decrease by addition of Cu at the both processes. It was suggested that a simple additivity rule does not hold in terms of the strengthening by grain-refinement and that by precipitation, especially at grain-size range less than 1 μm.

Original languageEnglish
Pages (from-to)2239-2244
Number of pages6
JournalMaterials Transactions
Volume45
Issue number7
DOIs
Publication statusPublished - Jul 2004

Fingerprint

Steel
Grain refinement
tensile properties
Tensile properties
Ferrite
Copper
ferrites
steels
copper
Aging of materials
tensile strength
Tensile strength
grain size
Martensitic steel
precipitation hardening
Age hardening
Dynamic recrystallization
austenite
ductility
Austenite

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Takaki, S., Fujioka, M., Aihara, S., Nagataki, Y., Yamashita, T., Sano, N., ... Yaguchi, H. (2004). Effect of copper on tensile properties and grain-refinement of steel and its relation to precipitation behavior. Materials Transactions, 45(7), 2239-2244. https://doi.org/10.2320/matertrans.45.2239

Effect of copper on tensile properties and grain-refinement of steel and its relation to precipitation behavior. / Takaki, Setuo; Fujioka, Masaaki; Aihara, Shuji; Nagataki, Yasunobu; Yamashita, Takako; Sano, Naoyuki; Adachi, Yoshitaka; Nomura, Masahiro; Yaguchi, Hiroshi.

In: Materials Transactions, Vol. 45, No. 7, 07.2004, p. 2239-2244.

Research output: Contribution to journalArticle

Takaki, S, Fujioka, M, Aihara, S, Nagataki, Y, Yamashita, T, Sano, N, Adachi, Y, Nomura, M & Yaguchi, H 2004, 'Effect of copper on tensile properties and grain-refinement of steel and its relation to precipitation behavior', Materials Transactions, vol. 45, no. 7, pp. 2239-2244. https://doi.org/10.2320/matertrans.45.2239
Takaki, Setuo ; Fujioka, Masaaki ; Aihara, Shuji ; Nagataki, Yasunobu ; Yamashita, Takako ; Sano, Naoyuki ; Adachi, Yoshitaka ; Nomura, Masahiro ; Yaguchi, Hiroshi. / Effect of copper on tensile properties and grain-refinement of steel and its relation to precipitation behavior. In: Materials Transactions. 2004 ; Vol. 45, No. 7. pp. 2239-2244.
@article{b31a265fc71b49b09b9d4c50d04bf0d5,
title = "Effect of copper on tensile properties and grain-refinement of steel and its relation to precipitation behavior",
abstract = "Progress of Ferrous Nano-Metal Project is introduced in the present paper. In the project, maximum use of copper clusters and precipitates is pursued for achieving better strength-ductility balance than that of conventional high-tensile strength steels. Fundamental aspect of clustering and precipitation of Cu in Fe-Cu alloys was studied using Optical Tomographic Atom-Probe (OTAP). It was found that Cu precipitation during aging was enhanced by plastic deformation. The observed Cu precipitation behavior was well related to the age-hardening behavior, that is, aging started at lower temperature and maximum hardness was higher for plastically deformed and aged ferrite. Aging behavior and associated tensile properties were further examined for Fe-C-Mn-Cu martensitic steel. Higher value of tensile strength times elongation was achieved in Fe-C-Mn-Cu steel than Fe-C-Mn steel. Finally, effect of Cu precipitation on grain-refinement of ferrite was studied for Fe-C-Mn-Cu steel. Ferrite grain smaller than 1 μm was obtained in both processes of strain-assisted ferrite transformation from heavily deformed austenite and dynamic recrystallization of heavily deformed ferrite. Ferrite grain size was found to decrease by addition of Cu at the both processes. It was suggested that a simple additivity rule does not hold in terms of the strengthening by grain-refinement and that by precipitation, especially at grain-size range less than 1 μm.",
author = "Setuo Takaki and Masaaki Fujioka and Shuji Aihara and Yasunobu Nagataki and Takako Yamashita and Naoyuki Sano and Yoshitaka Adachi and Masahiro Nomura and Hiroshi Yaguchi",
year = "2004",
month = "7",
doi = "10.2320/matertrans.45.2239",
language = "English",
volume = "45",
pages = "2239--2244",
journal = "Materials Transactions",
issn = "0916-1821",
publisher = "The Japan Institute of Metals and Materials",
number = "7",

}

TY - JOUR

T1 - Effect of copper on tensile properties and grain-refinement of steel and its relation to precipitation behavior

AU - Takaki, Setuo

AU - Fujioka, Masaaki

AU - Aihara, Shuji

AU - Nagataki, Yasunobu

AU - Yamashita, Takako

AU - Sano, Naoyuki

AU - Adachi, Yoshitaka

AU - Nomura, Masahiro

AU - Yaguchi, Hiroshi

PY - 2004/7

Y1 - 2004/7

N2 - Progress of Ferrous Nano-Metal Project is introduced in the present paper. In the project, maximum use of copper clusters and precipitates is pursued for achieving better strength-ductility balance than that of conventional high-tensile strength steels. Fundamental aspect of clustering and precipitation of Cu in Fe-Cu alloys was studied using Optical Tomographic Atom-Probe (OTAP). It was found that Cu precipitation during aging was enhanced by plastic deformation. The observed Cu precipitation behavior was well related to the age-hardening behavior, that is, aging started at lower temperature and maximum hardness was higher for plastically deformed and aged ferrite. Aging behavior and associated tensile properties were further examined for Fe-C-Mn-Cu martensitic steel. Higher value of tensile strength times elongation was achieved in Fe-C-Mn-Cu steel than Fe-C-Mn steel. Finally, effect of Cu precipitation on grain-refinement of ferrite was studied for Fe-C-Mn-Cu steel. Ferrite grain smaller than 1 μm was obtained in both processes of strain-assisted ferrite transformation from heavily deformed austenite and dynamic recrystallization of heavily deformed ferrite. Ferrite grain size was found to decrease by addition of Cu at the both processes. It was suggested that a simple additivity rule does not hold in terms of the strengthening by grain-refinement and that by precipitation, especially at grain-size range less than 1 μm.

AB - Progress of Ferrous Nano-Metal Project is introduced in the present paper. In the project, maximum use of copper clusters and precipitates is pursued for achieving better strength-ductility balance than that of conventional high-tensile strength steels. Fundamental aspect of clustering and precipitation of Cu in Fe-Cu alloys was studied using Optical Tomographic Atom-Probe (OTAP). It was found that Cu precipitation during aging was enhanced by plastic deformation. The observed Cu precipitation behavior was well related to the age-hardening behavior, that is, aging started at lower temperature and maximum hardness was higher for plastically deformed and aged ferrite. Aging behavior and associated tensile properties were further examined for Fe-C-Mn-Cu martensitic steel. Higher value of tensile strength times elongation was achieved in Fe-C-Mn-Cu steel than Fe-C-Mn steel. Finally, effect of Cu precipitation on grain-refinement of ferrite was studied for Fe-C-Mn-Cu steel. Ferrite grain smaller than 1 μm was obtained in both processes of strain-assisted ferrite transformation from heavily deformed austenite and dynamic recrystallization of heavily deformed ferrite. Ferrite grain size was found to decrease by addition of Cu at the both processes. It was suggested that a simple additivity rule does not hold in terms of the strengthening by grain-refinement and that by precipitation, especially at grain-size range less than 1 μm.

UR - http://www.scopus.com/inward/record.url?scp=4544282439&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4544282439&partnerID=8YFLogxK

U2 - 10.2320/matertrans.45.2239

DO - 10.2320/matertrans.45.2239

M3 - Article

AN - SCOPUS:4544282439

VL - 45

SP - 2239

EP - 2244

JO - Materials Transactions

JF - Materials Transactions

SN - 0916-1821

IS - 7

ER -