TEM Observation of HPT-Processed Cu-Added Excess Mg-Type Al-Mg-Si Alloys

Shun Maruno; Katsumi Watanabe; Kenji Matsuda; Seiji Saikawa; Shoichi Hirosawa; Zen Ji Horita; Seungwon Lee; Daisuke Terada

doi:10.4028/www.scientific.net/MSF.794-796.811

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HomeMaterials Science ForumMaterials Science Forum Vols. 794-796TEM Observation of HPT-Processed Cu-Added Excess...

TEM Observation of HPT-Processed Cu-Added Excess Mg-Type Al-Mg-Si Alloys

Abstract:

Severe plastic deformation (SPD) techniques, such as equal channel angular pressing (ECAP), accumulative roll bonding (ARB) and high pressure torsion (HPT) have been extensively investigated to achieve. SPD techniques make use of plastic deformation process where no change in the cross-sectional dimension of a work piece occurs during straining. In this work, the effect of HPT on the aging behavior and microstructure in excess Mg-type Al-Mg-Si alloys including Cu are investigated. These alloys were investigated by hardness test and transmission electron microscopy (TEM) observation.The results show that processing by HPT leads to significant grain refinement with a grain size of 200-250nm.An age-hardening phenomenon is observed at 343K and 373K for the Al-Mg-Si alloys with HPT. Some precipitates were observed on grain boundaries.

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Periodical:

Materials Science Forum (Volumes 794-796)

Pages:

811-814

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.794-796.811

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Online since:

June 2014

Authors:

Shun Maruno, Katsumi Watanabe, Kenji Matsuda*, Seiji Saikawa, Shoichi Hirosawa, Zen Ji Horita, Seungwon Lee, Daisuke Terada

Keywords:

Age-Hardening, Al-Mg-Si Alloy, HPT, TEM

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