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Mechanical properties of AZ31 Mg alloy recycled by severe deformation

Published online by Cambridge University Press:  01 March 2006

Yasumasa Chino ,
Tetsuji Hoshika ,
Jae-Seol Lee  and
Mamoru Mabuchi
Yasumasa Chino*
Affiliation:
Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology, Moriyama-ku, Nagoya 463-8560, Japan
Tetsuji Hoshika
Affiliation:
Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology, Moriyama-ku, Nagoya 463-8560, Japan
Jae-Seol Lee
Affiliation:
Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology, Moriyama-ku, Nagoya 463-8560, Japan
Mamoru Mabuchi*
Affiliation:
Department of Energy Science & Technology, Graduate School of Energy Science, Kyoto University, Yoshidahonmachi, Sakyo-ku, Kyoto 606-8501, Japan
*
a)Address all correspondence to these authors. e-mail: y-chino@aist.go.jp
b)Address all correspondence to these authors. e-mail: mabuchi@energy.kyoto-u.ac.jp
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Abstract

AZ31 Mg machined chips were recycled by extrusion at 673 K with a low extrusion ratio of 45:1 and a high extrusion ratio of 1600:1. Oxide contaminants were dispersed more uniformly in the recycled specimen with the high extrusion ratio than in that with the low extrusion ratio. In tensile tests, the recycled specimens with the high extrusion ratio showed about 50% higher 0.2% yield stress and about 20% higher tensile strength compared with those of the reference specimens, which were the extruded AZ31 Mg blocks under the same conditions as the recycled specimens. The improvement of the tensile properties was attributed not only to the small grain size, but also to the dispersed oxide contaminants.

Keywords

ExtrusionMgMicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 3 , March 2006 , pp. 754 - 760
Copyright
Copyright © Materials Research Society 2006

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