Title: Double mechanical alloying of Al-5wt-percent-Fe-4wt-percent-Mn
Authors: Lebrun, Pierre ×
Froyen, Ludo
Delaey, Lucas #
Issue Date: Sep-1992
Publisher: Elsevier science sa lausanne
Series Title: Materials science and engineering a-structural materials properties microstructure and processing vol:157 issue:1 pages:79-88
Abstract: The mechanical alloying process has been applied to a blend of Al, Fe and Mn powders, in order to produce an Al alloy stabilized by inert dispersions and strengthened by a high volume fraction of intermetallics. The microstructure obtained after a first grinding operation consists of unreacted Fe and Mn particles embedded in a fine grained Al matrix. Intermetallics are formed during heat treatment of the milled powders and are refined in a subsequent mechanical alloying stage. During heat treatment of the powders a metastable Al6Fe intermetallic phase is formed. This phase is stabilized by Mn replacing part of the Fe which results in an Al6(Fe,Mn) intermetallic. In the alloy studied in detail (Al-5wt.%Fe-4wt%Mn), the intermetallic has the composition Al12FeMn. Some Al6Mn also forms around large Mn particles, slowing down diffusion of Mn towards the Al6Fe particles. Mechanical properties are evaluated and the E modulus is shown to be a function of the volume fraction of intermetallics.
ISSN: 0921-5093
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Physical Metallurgy and Materials Engineering Section (-)
× corresponding author
# (joint) last author

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