Dilatometer Study of Aluminium-Silicon Based Alloys with Metastabile Structures

Béla Varga; Eva Fazakas; L.K. Varga

doi:10.4028/www.scientific.net/MSF.649.529

Paper Titles

Determining Thermal Properties of Insulating Sleeves
p.487

Comparison of Thermal Analysis and Differential Thermal Analysis for Evaluating Solid Fraction Evolution during Solidification of Al-Si Alloys
p.493

Regression Model Describing the Thermal Conductivity of Various Cast Irons
p.499

The Effects of Solidification Conditions and Heat Treatment on the Microstructure and Mechanical Properties of EN-AC 44400 Alloy
p.505

Effects of Carbon Content on the Ultimate Tensile Strength in Gray Cast Iron
p.511

Fracture Mechanics of Gray Cast Iron
p.517

Assessment of the Al Corner of the Ternary Al–Fe–Si System
p.523

Dilatometer Study of Aluminium-Silicon Based Alloys with Metastabile Structures
p.529

Heat Balance of the Model Ingot Head
p.533

HomeMaterials Science ForumMaterials Science Forum Vol. 649Dilatometer Study of Aluminium-Silicon Based...

Dilatometer Study of Aluminium-Silicon Based Alloys with Metastabile Structures

Abstract:

Aluminum-Silicon alloys are sought in a large number of automotive and aerospace applications due to their low coefficient of thermal expansion and high wear resistance. The fine structure of Si precipitates is controlled by forced solid solution structure obtainable by rapidly solidification techniques [1, 2, 3]. Present study focuses on precipitation of silicon in Al88Si12 as a function of temperature by dilatometer analysis. Different structures out of equilibrium have been obtained after casting in sand, black-lead and steel mould and by melt spinning. The average value of the activation energy for the precipitation of Si in steel mould casting of eutectic composition was found to be 47 kJ/mol. Our dilatometer studies were complemented by metallographic microscopy and XRD measurements.

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Periodical:

Materials Science Forum (Volume 649)

Pages:

529-532

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.649.529

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Online since:

May 2010

Authors:

Béla Varga, Eva Fazakas, L.K. Varga

Keywords:

Activation Energy, Al-Si Alloy, Metastable Structures, Precipitation, Silicon

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References

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