Effect of Cu and Mg on Forging Property and Mechanical Behavior of Powder Forged Al-Si-Fe Based Alloy
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Published:2007-01
Issue:
Volume:534-536
Page:389-392
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ISSN:1662-9752
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Container-title:Materials Science Forum
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language:
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Short-container-title:MSF
Author:
Lee Dong Suk1,
Jung Taek Kyun1,
Kim Mok Soon1,
Kim Won Yong2
Affiliation:
1. Inha University
2. Korea Institute of Industrial Technology
Abstract
Two atomized alloy powders, those chemical compositions are Al-10Si-5Fe-1Zr and Al-
10Si-5Fe-4Cu-2Mg-1Zr, were pre-compacted by cold pressing with 350MPa and subsequently hot
forged at temperatures ranging from 653K to 845K and at an initial strain rate of 10-2/s in order to
produce bulk cylindrical type alloys with the diameter of 10 mm. The addition of Cu and Mg into
the present alloy causes a decrease in the eutectic reaction temperature of Al-10Si-5Fe-1Zr alloy
from 841K to 786K and results in a decrease of flow stress at the given forging temperature. TEM
observation revealed that in addition to Al-Fe based intermetallics, Al2Cu and Al2CuMg
intermetallics appeared to display the alloying effect additionally. The volume fraction of
intermetallic dispersiods increased by the addition of Cu and Mg. Compressive strength of the
present alloys was closely related to the volume fraction of intermetallic dispersoids.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science