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Consolidation and Mechanical Properties of Mechanically Alloyed Al-Mg Powders

Published online by Cambridge University Press:  01 February 2011

Mira Sakaliyska ,
Sergio Scudino ,
Hoang Viet Nguyen ,
Kumar Babu Surreddi ,
Birgit Bartusch ,
Fahad Ali ,
Ji Soon Kim  and
Jürgen Eckert
Mira Sakaliyska
Affiliation:
[email protected], United States
Sergio Scudino
Affiliation:
[email protected], IFW Dresden, Dresden, Germany
Hoang Viet Nguyen
Affiliation:
[email protected], University of Ulsan, Ulsan, Korea, Republic of
Kumar Babu Surreddi
Affiliation:
[email protected], IFW Dresden, Dresden, Germany
Birgit Bartusch
Affiliation:
[email protected], IFW Dresden, Dresden, Germany
Fahad Ali
Affiliation:
[email protected], IFW Dresden, Dresden, Germany
Ji Soon Kim
Affiliation:
[email protected], University of Ulsan, Ulsan, Korea, Republic of
Jürgen Eckert
Affiliation:
[email protected], IFW Dresden, Dresden, Germany
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Abstract

Nanostructured Al-Mg bulk samples with compositions in the range of 10 – 40 at.% Mg have been produced by consolidation of mechanical alloyed powders. Powders with composition Al90Mg10 and Al80Mg20 were consolidated into highly dense specimens by hot extrusion. Room temperature compression tests for the Al90Mg10 specimen reveal interesting mechanical properties, namely, a high strength of 630 MPa combined with a plastic strain of about 4 %. The increase of the Mg content to 20 at.% increases the strength by about 100 MPa but it suppresses plastic deformation. The Al60Mg40 powder was consolidated at different temperatures by spark plasma sintering and the effect of the sintering temperature on microstructure, density and hardness have been studied. The results reveal that both density and hardness of the consolidated samples increase with increasing sintering temperature, while retaining a nanocrystalline structure. These results indicate that powder metallurgy is a suitable processing route for the production of nanocrystalline Al-Mg alloys with promising mechanical properties.

Keywords

mechanical alloyingpowder metallurgynanostructure
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1128: Symposium U – Advanced Intermetallic-Based Alloys for Extreme Environment and Energy Applications , 2008 , 1128-U05-46
Copyright
Copyright © Materials Research Society 2009

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