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Role of Bi and Ca Additions in Controlling the Microstructure of Sr-Modified 319 Alloys
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Hydrogen Permeation Behaviour in Aluminium Alloys
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Recently-Developed Aluminium Solutions for Aerospace Applications
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Microstructures of Alumina-Aluminium/Magnesium Interpenetrating Composites
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Superplasticity in Coarse-Grained Al-Mg Alloys
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Metallurgical Mechanisms Controlling Mechanical Properties of Aluminium Alloy 2219 Produced by Electron Beam Freeform Fabrication
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Evolution and Control of 2219 Aluminium Microstructural Features through Electron Beam Freeform Fabrication
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Structure and Properties of Mechanically Alloyed Composite Materials from Scrap of Al Alloys
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Microstructures of Alumina-Aluminium/Magnesium Interpenetrating Composites

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Abstract:

Interpenetrating composites allow a completely 3-dimensional matrix of two phases, in this case an alumina (ceramic) and aluminium-magnesium alloy (metal), to be developed. This 3-dimensionality yields a material with mechanical and physical properties that are superior to either the metal or ceramic individually. The composites were produced by heating an alumina foam and aluminium-magnesium alloys together in flowing nitrogen to in excess of 900°C. At these temperatures the alloy is drawn into the ceramic foam by capillary action. The infiltration process is dependent on the interaction of the alloy with the nitrogen atmosphere in the furnaces. This complex interaction and its affect on the microstructural development has been studied using Electron Backscatter Diffraction (EBSD) coupled with Energy Dispersive x-ray Spectroscopy (EDS).

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Periodical:

Materials Science Forum (Volumes 519-521)

Pages:

1279-1284

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.519-521.1279

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Online since:

July 2006

Authors:

Rebecca L. Higginson, H. Chang, Jon Binner

Keywords:

Al-Mg, Aluminum (Al), Composite, Electron Backscatter Diffraction (EBSD)

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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