Solid solution hardening in supersaturated AlMgSi alloy

Ken Takata, Kohsaku Ushioda, Kenji Kaneko, Ryutaro Akiyoshi, Ken ichi Ikeda, Satoshi Hata, Hideharu Nakashima

研究成果: ジャーナルへの寄稿記事

抄録

The yield strength and work hardening of AlMgSi alloys are related to the concentration of solute atoms. This study was carried out to clarify the effect of two kinds of solute atoms on these properties in terms of a linear combination of contributions from a solid solution. Tensile tests were conducted with Al and with Al0.62Mg0.32Si, Al0.65Mg0.81Si, Al2.4Mg, and Al4.4Mg (mass%) alloys in solid solution. Work hardening was analyzed using the KocksMecking model, yielding two parameters which indicate the storage and recovery of dislocations in the material. The yield strength could not be expressed as a linear combination of solute atom concentrations, but the amount of dislocation storage and dynamic recovery could be expressed as such linear combinations. In the high-strain region, the KocksMecking model no longer applies, and the maximum stress at which the model failed increased with increasing concentrations of solute atoms. It is generally known that an interaction between strain fields around solute atoms and quenched-in vacancies can affect the yield strength owing to dislocation motion and that these atoms can retard the development of microstructures in high-strain regions. A linear combination of contributions from solid solutions is possible only for the storage and recovery of dislocations in the low-strain region.

元の言語英語
ページ(範囲)2525-2529
ページ数5
ジャーナルMaterials Transactions
60
発行部数12
DOI
出版物ステータス出版済み - 1 1 2019

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hardening
Hardening
Solid solutions
solutes
solid solutions
yield strength
Atoms
work hardening
recovery
Yield stress
atoms
Strain hardening
Recovery
atom concentration
tensile tests
Dislocations (crystals)
Vacancies
microstructure
Microstructure
interactions

All Science Journal Classification (ASJC) codes

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

これを引用

Solid solution hardening in supersaturated AlMgSi alloy. / Takata, Ken; Ushioda, Kohsaku; Kaneko, Kenji; Akiyoshi, Ryutaro; Ikeda, Ken ichi; Hata, Satoshi; Nakashima, Hideharu.

:: Materials Transactions, 巻 60, 番号 12, 01.01.2019, p. 2525-2529.

研究成果: ジャーナルへの寄稿記事

Takata, Ken ; Ushioda, Kohsaku ; Kaneko, Kenji ; Akiyoshi, Ryutaro ; Ikeda, Ken ichi ; Hata, Satoshi ; Nakashima, Hideharu. / Solid solution hardening in supersaturated AlMgSi alloy. :: Materials Transactions. 2019 ; 巻 60, 番号 12. pp. 2525-2529.
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