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Production and characterization of Al 2024 matrix composites reinforced with β-Al3Mg2 complex metallic alloy particles

Published online by Cambridge University Press:  25 January 2013

Xiaorui Wang ,
Sergio Scudino  and
Jürgen Eckert
Xiaorui Wang
Affiliation:
IFW Dresden, Institut für Komplexe Materialien, Helmholtzstr. 20, D-01069 Dresden, Germany.
Sergio Scudino
Affiliation:
IFW Dresden, Institut für Komplexe Materialien, Helmholtzstr. 20, D-01069 Dresden, Germany.
Jürgen Eckert
Affiliation:
IFW Dresden, Institut für Komplexe Materialien, Helmholtzstr. 20, D-01069 Dresden, Germany. TU Dresden, Institut für Werkstoffwissenschaft, D-01062 Dresden, Germany,
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Abstract

In this work, composites consisting of the Al 2024 matrix reinforced with β-Al3Mg2 particles have been produced by powder metallurgy with the aim of increasing the strength of the matrix and, at the same time, reducing the density of the material. The β-Al3Mg2 phase represents an ideal candidate as reinforcement in lightweight composites due to its low density and high-temperature strength. The β-Al3Mg2 reinforcement remarkably improves the mechanical properties of the 2024 matrix. In particular, the composite with 20 vol.% reinforcement display yield and compressive strengths exceeding that of the unreinforced matrix by about 120 and 180 MPa, while retaining appreciable plastic deformation of about 30 %. The strength of the material is further increased for the samples with 30 and 40 vol.% of β-Al3Mg2 phase, however, the composites show reduced plastic deformation of 11 and 4.5 %. Furthermore, the addition of the low-density β-Al3Mg2 particles decreases the density of the materials below that of the unreinforced 2024 matrix, considerably increasing the specific strength of the composites.

Keywords

compositepowder metallurgycompound
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1517: Symposium KK – Complex Metallic Alloys , 2013 , mrsf12-1517-kk04-05
Copyright
Copyright © Materials Research Society 2013

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