Understanding the rapid solidification of Al-4.3Cu and Al-17Cu using X-ray tomography - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Metallurgical and Materials Transactions A Année : 2006

Understanding the rapid solidification of Al-4.3Cu and Al-17Cu using X-ray tomography

A. Prasad
  • Fonction : Auteur
H. Henein
  • Fonction : Auteur
Charles-André Gandin

Résumé

X-ray tomography using synchrotron radiation with 1-µm beam resolution at European Synchrotron Radiation Facility was used to generate three-dimensional (3-D) images for rapidly solidified 660 µm A14.3 wt pct Cu and 500 µm Al17 wt pct Cu atomized droplets. Based on the observation of microstructural features in the 3-D images, physical phenomena of rapid solidification such as nucleation and initial growth, recalescence, and porosity were apparent and are reported. A single nucleation site was observed and the coordinates of this single nucleation site were evaluated. The volume fraction of the initial growth regime and recalescence during solidification was successfully quantified. It was also possible to semiquantitatively explain the porosity distribution within the droplets. These observations will be used to present a description of the sequence of the solidification events in these droplets.

Domaines

Matériaux
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Dates et versions

hal-00436216 , version 1 (26-11-2009)

Identifiants

  • HAL Id : hal-00436216 , version 1

Citer

A. Prasad, H. Henein, Eric Maire, Charles-André Gandin. Understanding the rapid solidification of Al-4.3Cu and Al-17Cu using X-ray tomography. Metallurgical and Materials Transactions A, 2006, pp.249-257. ⟨hal-00436216⟩
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