Fabrication and Characterization of Supersaturated Al-Mg Alloys by Severe Plastic Deformation and Their Mechanical Properties

Kenji Kaneko; Tetsuro Hata; Tomoharu Tokunaga; Zenji Horita

doi:10.2320/matertrans.MD200813

Kenji Kaneko, Tetsuro Hata, Tomoharu Tokunaga, Zenji Horita

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Keywords: aluminum-magnesium alloy, severe plastic deformation (SPD), high pressure torsion (HPT), transmission electron microscopy (TEM), X-ray diffraction (XRD)

JOURNAL FREE ACCESS

2009 Volume 50 Issue 1 Pages 76-81

DOI https://doi.org/10.2320/matertrans.MD200813

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Abstract

Excess amount of Mg was intentionally added to fabricate supersaturated ultra-fine grained Al-Mg alloy by high pressure torsion (HPT). Their microstructures and mechanical properties were examined by X-ray diffraction (XRD) analysis, transmission electron microscopy (TEM) and Vickers microhardness test. It was confirmed that the minimum grain size reached ∼40 nm and maximum microhardness 292 Hv at the Mg content with 30 mass%. Further increase of the amount of Mg resulted the formation of β-Al₃Mg₂ and decrease of microhardness.

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