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In situ X-ray tomography observation of inhomogeneous deformation in semi-solid aluminium alloys

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2009
auteur(s) Terzi Sofiane; Salvo Luc; Suery Michel; Limodin Nathalie; Adrien Jérôme; Maire Eric; Pannier Yannick; Bornert Michel; Bernard Dominique; Felberbaum Milan; Rappaz Michel; Boller Elodie
journal (abréviation) Scripta Materialia (Scripta Mater)
volume (numéro) 61 (5)
  
pages 449 – 452
résumé The aim of this paper is to report the very first in situ observations of the deformation behaviour of an Al–Cu alloy in the semi-solid state by using ultrafast, high-resolution X-ray microtomography. It is shown that this deformation is non-homogeneous and involves an accumulation of liquid at an intergranular surface nearly perpendicular to the strain axis. Once the liquid is no longer able to feed such a region, micropores form and grow at this surface, finally leading to a crack.
mots clés In situ X-ray tomography; Aluminium alloys; Semi-solid state; Deformation; Pores
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