ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The kinds, morphologies and distributions, enclosed the micro-structural evolvement ofAl-1.5Si-1.1Mg-0.5Cu alloy during homogenization treatment were investigated by means of opticalmicroscopy, XRD, SEM/EDS and TEM/EDS. The results show that there were mainly three kinds ofmorphologically distinct constituents in as-cast Al-1.5Si-1.1Mg-0.5Cu alloy for automotive panels,such as coarse Mg2Si and Al8(FeMn)2Si, and multiphase eutectic structure consisted of AlMgSiFeCuelements, except the α-Al matrix phase. The coarse Mg2Si and Al8(FeMn)2Si were distributed in theα-Al interdentritic regions or at grain boundaries, the former sometimes appears more obviouseutectic characteristics than the later one. The multiphase eutectic products distributed both insidegrains with agglomerate aspects and along the α-Al interdentritic regions or at grain boundaries,which is contained with Si and Al2Cu. Coarse binary eutectic structure Mg2Si partly dissolved intomatrix and the eutectic characteristics disappeared, whereas Al8(FeMn)2Si changed a little duringhomogenization. Agglomerate multi-eutectic structures were non-equilibrium products, some ofthem fully dissolved into matrix and the others partially dissolved and left the discrete blocky Sibehind after homogenization
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.546-549.1037.pdf
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