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Al-0.62 mass%Mg-0.32 mass%Si 合金の引張変形特性に及ぼす時効析出形態の影響

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Title: Al-0.62 mass%Mg-0.32 mass%Si 合金の引張変形特性に及ぼす時効析出形態の影響
Other Titles: Influence of Aging Products on Tensile Deformation Behavior of Al-0.62 mass%Mg-0.32 mass%Si Alloy
Authors: 秋吉, 竜太郎1 Browse this author
池田, 賢一2 Browse this author →KAKEN DB
波多, 聰3 Browse this author
中島, 英治4 Browse this author
笠間, 丈史5 Browse this author
高田, 健6 Browse this author
高橋, 淳7 Browse this author
潮田, 浩作8 Browse this author
金子, 賢治9 Browse this author
Authors(alt): Akiyoshi, Ryutaro1
Ikeda, Ken-ichi2
Hata, Satoshi3
Nakashima, Hideharu4
Kasama, Takeshi5
Takata, Ken6
Takahashi, Jun7
Ushioda, Kohsaku8
Kaneko, Kenji9
Keywords: aluminum-magnesium-silicon alloy
magnesium-silicon cluster
needle-like β" precipitate
tensile deformation behavior
dislocation substructure
cutting mechanism
Issue Date: May-2015
Publisher: 日本金属学会
Journal Title: 日本金属学会誌
Journal Title(alt): Journal of the Japan Institute of Metals
Volume: 79
Issue: 5
Start Page: 273
End Page: 279
Publisher DOI: 10.2320/jinstmet.J2014063
Abstract: Tensile tests and microstructural observations were carried out to investigate the influence of aging products on tensile deformation behavior of Al-0.62 mass%Mg-0.32 mass%Si alloy. Solution-treated alloys were aged to form needle-like β″ precipitates or Mg-Si clusters. The aged alloy with β″ precipitates showed higher yield stress than that with Mg-Si clusters. Transmission electron microscopy observations revealed that the β″ precipitates pinned dislocations. It was suggested that the strengthening types of the alloy with β″ precipitates were both Orowan and cutting mechanism, by estimating the Orowan stress and considering crystal structure of β″ precipitates. In contrast, the aged alloys with Mg-Si clusters showed excellent performance of uniform elongation due to large work hardening compared to those of the alloy with β″ precipitates. Dislocations in the alloy with Mg-Si clusters were wavy in morphology. The yield stress of the alloy with Mg-Si clusters was higher than that of the solution-treated alloy and much lower than the estimated Orowan stress. This result indicated that the cutting mechanism was the main strengthening type of the aged alloy with Mg-Si clusters, and this strengthening mechanism gave a good balance of strength and elongation.
Type: article
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 池田 賢一

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