MATERIALS TRANSACTIONS
Online ISSN : 1347-5320
Print ISSN : 1345-9678
ISSN-L : 1345-9678
Magnesium Matrix Composite with Solid-state Synthesized Mg2Si Dispersoids
Katsuyoshi KondohHideki OginumaRitsuko TuzukiTatsuhiko Aizawa
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2003 Volume 44 Issue 4 Pages 611-618

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Abstract

For improvement of the mechanical properties of magnesium alloys, the material and process design for MMC was established to disperse solid-state synthesized Mg2Si in the magnesium alloys, in employing the elemental magnesium and silicon powder mixture. In the repeated plastic working on the raw mixture for the refinement of silicon particles and their uniform distribution in the AZ31 primary powder, Mg2Si/Mg composite alloys show fine microstructures and superior mechanical properties: UTS is about 350 MPa and YS is over 300 MPa. This is because of fine Mg2Si dispersoids with a mean particle size less than 5 μm as well as refined matrix grain of 2–5 μm. The specific tensile strength is much higher than that of the conventional magnesium and aluminum alloys such as AZ31, AZ91 and 2014(T6) alloys. This material and process design is possible to apply to the mass-production process in using a large scale manufacturing equipments.

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© 2003 The Japan Institute of Metals and Materials
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