Identification of precipitate phases in a mechanically alloyed rapidly solidified Al-Fe-Ce alloy

Journal Article · Mon Apr 01 00:00:00 EST 1996 · Metallurgical Transactions, A

OSTI ID:250730

Oevecoglu, M L ^[1]; Suryanarayana, C ^[2]; Nix, W D ^[3]

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1. Istanbul Technical Univ. (Turkey). Dept. of Metallurgical Engineering
2. Univ. of Idaho, Moscow, ID (United States). Inst. for Materials and Advanced Processes
3. Stanford Univ., CA (United States). Dept. of Materials Science and Engineering

The stable and metastable precipitate phases which form during mechanical alloying of a rapidly solidified (RS) Al-8.4Fe-3.4Ce alloy have been unambiguously identified using X-ray diffraction, transmission electron microscopy (TEM), and energy dispersive spectroscopy techniques. The metastable Al{sub 10}Fe{sub 2}Ce and stable Al{sub 13}Fe{sub 3}Ce and Al{sub 13}Fe{sub 4} intermetallic phases, with crystal structures and lattice parameters as reported in the literature, have been identified. It is shown that the metastable Al{sub 10}Fe{sub 2}Ce intermetallic phase particles have elongated shapes and their sizes range between 100 and 200 nm and are free of any localized faults, whereas the equilibrium Al{sub 13}Fe{sub 3}Ce and Al{sub 13}Fe{sub 4} intermetallic phases are equiaxed in shape and have particle sizes ranging from 200 to 500 nm. It is suggested that the presence of the metastable Al{sub 10}Fe{sub 2}Ce in this material is due to its incomplete transformation to the equilibrium Al{sub 13}Fe{sub 3}Ce phase.

• OSTI ID: 250730
• Journal Information: Metallurgical Transactions, A, Vol. 27, Issue 4; Other Information: PBD: Apr 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
33 ADVANCED PROPULSION SYSTEMS
ALUMINIUM BASE ALLOYS
MILLING
PHASE STUDIES
IRON ALLOYS
CERIUM ALLOYS
AEROSPACE INDUSTRY
MATERIALS
INTERMETALLIC COMPOUNDS
POWDERS
HOT PRESSING
X-RAY DIFFRACTION
TRANSMISSION ELECTRON MICROSCOPY
X-RAY SPECTROSCOPY