Structural changes in dispersion strengthened Al-Fe-V-Si alloy at elevated temperatures

V. Ezersky; M. Talianker

doi:10.4028/www.scientific.net/msf.269-272.607

Structural changes in dispersion strengthened Al-Fe-V-Si alloy at elevated temperatures

V. Ezersky, M. Talianker

Department of Materials Engineering

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The effect of high-temperature exposure on the microstructural evolution in the rapidly solidified Al-8.5Fe-1.3V-1.7Si alloy has been investigated by transmission electron microscopy. Decomposition of the microstructure starts with the formation of vanadium-rich intermetallic particles of composition close to (Al, Si)₄₅(V, Fe)₇, isostructural with the monoclinic Al₄₅V₇ phase. The appearance of this phase was observed in the specimens subjected to heat treatment at 450°C for 200 hours. Then, at the higher temperature of 500°C, needle-shaped particles of the monoclinic Al₁₃Fe₄ structure, 2-3 μm length, grew in the matrix after the exposure for 250 hours. The process was accompanied by significant coarsening of some of the nanoparticles, thus indicating that there exists a correlation between destabilization of α-Al₁₂(Fe,V)₃Si nanoparticles and the appearance of vanadium and iron containing phases.

Original language	English
Pages (from-to)	607-612
Number of pages	6
Journal	Materials Science Forum
Volume	269-272
Issue number	PART 2
DOIs	https://doi.org/10.4028/www.scientific.net/msf.269-272.607
State	Published - 1 Jan 1998

Keywords

Aluminium alloys
Nanoparticles
Transmission electron microscopy

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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Cite this

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title = "Structural changes in dispersion strengthened Al-Fe-V-Si alloy at elevated temperatures",

abstract = "The effect of high-temperature exposure on the microstructural evolution in the rapidly solidified Al-8.5Fe-1.3V-1.7Si alloy has been investigated by transmission electron microscopy. Decomposition of the microstructure starts with the formation of vanadium-rich intermetallic particles of composition close to (Al, Si)45(V, Fe)7, isostructural with the monoclinic Al45V7 phase. The appearance of this phase was observed in the specimens subjected to heat treatment at 450°C for 200 hours. Then, at the higher temperature of 500°C, needle-shaped particles of the monoclinic Al13Fe4 structure, 2-3 μm length, grew in the matrix after the exposure for 250 hours. The process was accompanied by significant coarsening of some of the nanoparticles, thus indicating that there exists a correlation between destabilization of α-Al12(Fe,V)3Si nanoparticles and the appearance of vanadium and iron containing phases.",

keywords = "Aluminium alloys, Nanoparticles, Transmission electron microscopy",

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AU - Ezersky, V.

AU - Talianker, M.

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N2 - The effect of high-temperature exposure on the microstructural evolution in the rapidly solidified Al-8.5Fe-1.3V-1.7Si alloy has been investigated by transmission electron microscopy. Decomposition of the microstructure starts with the formation of vanadium-rich intermetallic particles of composition close to (Al, Si)45(V, Fe)7, isostructural with the monoclinic Al45V7 phase. The appearance of this phase was observed in the specimens subjected to heat treatment at 450°C for 200 hours. Then, at the higher temperature of 500°C, needle-shaped particles of the monoclinic Al13Fe4 structure, 2-3 μm length, grew in the matrix after the exposure for 250 hours. The process was accompanied by significant coarsening of some of the nanoparticles, thus indicating that there exists a correlation between destabilization of α-Al12(Fe,V)3Si nanoparticles and the appearance of vanadium and iron containing phases.

AB - The effect of high-temperature exposure on the microstructural evolution in the rapidly solidified Al-8.5Fe-1.3V-1.7Si alloy has been investigated by transmission electron microscopy. Decomposition of the microstructure starts with the formation of vanadium-rich intermetallic particles of composition close to (Al, Si)45(V, Fe)7, isostructural with the monoclinic Al45V7 phase. The appearance of this phase was observed in the specimens subjected to heat treatment at 450°C for 200 hours. Then, at the higher temperature of 500°C, needle-shaped particles of the monoclinic Al13Fe4 structure, 2-3 μm length, grew in the matrix after the exposure for 250 hours. The process was accompanied by significant coarsening of some of the nanoparticles, thus indicating that there exists a correlation between destabilization of α-Al12(Fe,V)3Si nanoparticles and the appearance of vanadium and iron containing phases.

KW - Aluminium alloys

KW - Nanoparticles

KW - Transmission electron microscopy

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Structural changes in dispersion strengthened Al-Fe-V-Si alloy at elevated temperatures

Abstract

Keywords

ASJC Scopus subject areas

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