Reference : Composition and phases in laser welded Al-Cu joints by synchrotron x-ray microdiffraction

	Document type :	Scientific journals : Article
	Discipline(s) :	Engineering, computing & technology : Materials science & engineering
	To cite this reference:	http://hdl.handle.net/10993/36534

Title :	Composition and phases in laser welded Al-Cu joints by synchrotron x-ray microdiffraction
Language :	English
Author, co-author :	Schmalen, Pascal Guy [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
	Plapper, Peter [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
	Peral Alonso, Inmaculada [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
	Titov, Ivan [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
	Vallcorba, Oriol [ALBA Synchrotron]
	Rius, Jordi [Institut de Ciencia de Materials de Barcelona]
Publication date :	Sep-2018
Journal title :	Proceedings of 10th CIRP Conference on Photonic Technologies [LANE 2018]
Peer reviewed :	Yes
Audience :	International
Keywords :	[en] Laser ; welding ; microdiffraction ; Al ; Cu ; intermetallic
Abstract :	[en] This paper presents the characterization of the intermetallic phases of laser-welded Al-Cu joints by synchrotron trough-the-substrate microdiffraction combined with SEM/EDX and etched/non-etched optical micrographs. Transmission microdiffraction offers the spatial resolution and beam flux necessary to study the intermetallic phases, which in conjunction with the excellent contrast of etched micrographs, rendered possible the phase identification. It was found that the major phases are Al2Cu (θ), Al4Cu9 (γ1) and AlCu (η2) were formed. The Al3Cu4 (ζ1) and δ phases where formed in less amount and found to be the primary cause for cracks inside the weld seam and therefore for the failure of the joint.
Permalink :	http://hdl.handle.net/10993/36534
FnR project :	FnR ; FNR10155468 > Pascal Guy Schmalen > CoLaWeDi > Closed-loop control of the laser-braze welding process of dissimilar materials > 01/09/2015 > 14/03/2019 > 2015

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