Effect of the Coriolis force on the macrosegregation of aluminum in the centrifugal casting of Ti-Al alloys - Université de Lorraine Accéder directement au contenu
Article Dans Une Revue IOP Conference Series: Materials Science and Engineering Année : 2019

Effect of the Coriolis force on the macrosegregation of aluminum in the centrifugal casting of Ti-Al alloys

M. Cisternas Fernández
M. Zaloznik
H. Combeau
C. Huang
  • Fonction : Auteur
U. Hecht
  • Fonction : Auteur

Résumé

Within the framework of the ESA GRADECET project, experiments of directional solidification of cylindrical Ti-Al samples were conducted in hypergravity. The experiments were performed in a centrifuge with the apparent gravity (sum of centrifugal and terrestrial gravity) aligned along the cylinder centerline. 3D numerical simulations of aluminum macrosegregation in these samples are presented. A volume-averaging solidification model is used that accounts for centrifugal and Coriolis accelerations in a non-inertial rotating reference system. We compare the melt flow pattern and the macrosegregation formation under terrestrial gravity and under 20 g centrifugation. The results show that the Coriolis acceleration, although very weak, breaks the symmetry of the thermosolutal convection, having an important impact on the final macrosegregation pattern. The macrosegregation is entirely modified in comparison with a sample solidified under terrestrial gravity conditions. Besides the aluminum segregation intensity increases with the centrifugation level.
Fichier principal
Vignette du fichier
Cisternas_Fernández_2019_IOP_Conf._Ser.__Mater._Sci._Eng._529_012033.pdf (1.14 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-02151414 , version 1 (08-06-2019)

Identifiants

Citer

M. Cisternas Fernández, M. Zaloznik, H. Combeau, C. Huang, J. Zollinger, et al.. Effect of the Coriolis force on the macrosegregation of aluminum in the centrifugal casting of Ti-Al alloys. IOP Conference Series: Materials Science and Engineering, 2019, 529, pp.012033. ⟨10.1088/1757-899X/529/1/012033⟩. ⟨hal-02151414⟩
48 Consultations
93 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More