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In situ 3D characterization of high temperature fatigue damage mechanisms in a cast aluminum alloy using synchrotron X-ray tomography

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2016
auteur(s) Dezecot Sébastien; Buffière Jean-Yves; Koster Alain; Maurel Vincent; Szmytka Fabien; Charkaluk Eric; Dahdah Nora; El Bartali Ahmed; Limodin Nathalie; Witz Jean-François
journal (abréviation) Scripta Materialia (Scripta Mater)
volume (numéro) 113
  
pages 254 – 258
résumé Fatigue tests were performed at 250 °C on a cast AlSi7Cu3Mg aluminum alloy and monitored with Synchrotron in situ X-ray tomography in order to understand the micro-mechanisms of crack initiation and propagation. The analysis of the 3D images reveals that internal shrinkage pores are responsible for the main crack initiation. Crack propagation is mainly due to the complex and highly interconnected network of hard particles of the eutectic regions.
mots clés Tomography; Fatigue; High-temperature; Aluminum alloy; Cracks
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