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Formation of intermetallic phases in diffusion-welded joints of aluminium and magnesium alloys. / Valerie Randle, Mark Coleman

Journal of Materials Science, Volume: 46

Swansea University Authors: Valerie Randle, Mark Coleman

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DOI (Published version): 10.1007/s10853-010-4841-5

Abstract

Basic research has been done on diffusion-welded joints with the overall aim of an adjustedinterface design. The phase formation of aluminium alloy / magnesium alloy bonds has been revealedby X-ray diffraction, energy-dispersive spectroscopy and electron back-scatter diffraction. Thepresence of Al12...

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Published in: Journal of Materials Science
Published: 2011
URI: https://cronfa.swan.ac.uk/Record/cronfa15137
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Abstract: Basic research has been done on diffusion-welded joints with the overall aim of an adjustedinterface design. The phase formation of aluminium alloy / magnesium alloy bonds has been revealedby X-ray diffraction, energy-dispersive spectroscopy and electron back-scatter diffraction. Thepresence of Al12Mg17 and Al3Mg2 precipitates has been confirmed where the microstructure of theinterface comprises Al3Mg2 and Al12Mg17 as a bi-layer. The distribution and microstructure of theformed intermetallics and the arrangement of the precipitates originating from the alloys have beendetermined. Precipitates originating from the alloys agglomerate in the bi-layered welding zone. Theirarrangement in combination with the grain boundary evolution of the intermetallics and the change ofthe aluminium base solid solution in the interface region has a significant influence on the mechanicalproperties of the joint.
College: College of Engineering
End Page: 364