Title: Structure evolution during mechanical alloying of Fe_(50)Al_(50) binary system
Abstract: Nanocrystalline Fe50Al50(mole fraction,%) alloy powder was synthesized by high-energy ball milling and subsequent heat treating.Both the structural evolution of elemental powder during mechanical alloying and the effect of heat treatment on microstructure of as-milled powder were investigated by X-ray diffractometry(XRD),transmission electron microscopy(TEM) and scanning electron microscopy(SEM).The mechanical alloying mechanism of Fe50Al50 powder during ball milling was also discussed.The results show that the diffusion of Al into Fe lattice occurs during milling,leading to the formation of Fe(Al) solid solution.The process was controlled by continuous diffusion mixing mechanism.After milling for 30 h,the powder is composed of Fe(Al) with grain size of 5.65 nm.The transformation from the disordered Fe(Al) solid solution into the ordered B2-FeAl intermetallic compound occurs after heat treating,accompanying with the growth of B2-FeAl grain which is still in nanometer scale.
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
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Cited By Count: 1
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