Khadoudja Ghedjati, Eric Fleury, Mohamed Seghir Hamani, Mostefa Benchiheub, Khaider Bouacha, and Bernard Bolle, Elaboration of AlSi10Mg casting alloys using directional solidification processing, Int. J. Miner. Metall. Mater., 22(2015), No. 5, pp. 509-515. https://doi.org/10.1007/s12613-015-1100-4
Cite this article as:
Khadoudja Ghedjati, Eric Fleury, Mohamed Seghir Hamani, Mostefa Benchiheub, Khaider Bouacha, and Bernard Bolle, Elaboration of AlSi10Mg casting alloys using directional solidification processing, Int. J. Miner. Metall. Mater., 22(2015), No. 5, pp. 509-515. https://doi.org/10.1007/s12613-015-1100-4
Khadoudja Ghedjati, Eric Fleury, Mohamed Seghir Hamani, Mostefa Benchiheub, Khaider Bouacha, and Bernard Bolle, Elaboration of AlSi10Mg casting alloys using directional solidification processing, Int. J. Miner. Metall. Mater., 22(2015), No. 5, pp. 509-515. https://doi.org/10.1007/s12613-015-1100-4
Citation:
Khadoudja Ghedjati, Eric Fleury, Mohamed Seghir Hamani, Mostefa Benchiheub, Khaider Bouacha, and Bernard Bolle, Elaboration of AlSi10Mg casting alloys using directional solidification processing, Int. J. Miner. Metall. Mater., 22(2015), No. 5, pp. 509-515. https://doi.org/10.1007/s12613-015-1100-4
Systems and Advanced Materials Laboratory (LASMA), Department of Physics, Faculty of Science, Badji Mokhtar University of Annaba, Annaba 23000, Algeria
Microstructure Investigation and Material Mechanic Laboratory (LEM3), CNRS, Lorraine-Metz University, île of Saulcy, Metz 57000, France
Faculty of Science, Souk Ahras University, Souk Ahras 41000, Algeria
Foundry Research Laboratory (LRF), Department of Physics, Faculty of Science, Badji Mokhtar University of Annaba, Annaba 23000, Algeria
The effects of pulling velocity on the solidification behavior and microstructural parameters of AlSi10Mg alloys prepared in a Bridgman-type directional solidification furnace were investigated. The microstructure, particularly the secondary dendritic arm spacing (SDAS), and the Brinell hardness (BH) of the solidified AlSi10Mg alloys were characterized for samples with cylindrical shapes and different conicities (θ=0°, 5°, and 10°). Microstructural studies revealed an increased density of α-Al phase dendrites and a decreased interdendritic distance with increasing pulling velocity. The dendrites were found to be preferentially oriented along the pulling direction for low pulling velocities. For larger pulling velocities, the dendrites grew first in the cooling direction but then broke as others nucleated and coarsened. The HB values of the solidified samples increased as the pulling velocity increased. In regard to sample conicity, smaller dendrites were observed for an apex angle of θ=5°, resulting in the largest HB value. This result was interpreted in terms of the favorable orientation of the dendrite along the pulling direction.
Systems and Advanced Materials Laboratory (LASMA), Department of Physics, Faculty of Science, Badji Mokhtar University of Annaba, Annaba 23000, Algeria
Microstructure Investigation and Material Mechanic Laboratory (LEM3), CNRS, Lorraine-Metz University, île of Saulcy, Metz 57000, France
Faculty of Science, Souk Ahras University, Souk Ahras 41000, Algeria
Foundry Research Laboratory (LRF), Department of Physics, Faculty of Science, Badji Mokhtar University of Annaba, Annaba 23000, Algeria
The effects of pulling velocity on the solidification behavior and microstructural parameters of AlSi10Mg alloys prepared in a Bridgman-type directional solidification furnace were investigated. The microstructure, particularly the secondary dendritic arm spacing (SDAS), and the Brinell hardness (BH) of the solidified AlSi10Mg alloys were characterized for samples with cylindrical shapes and different conicities (θ=0°, 5°, and 10°). Microstructural studies revealed an increased density of α-Al phase dendrites and a decreased interdendritic distance with increasing pulling velocity. The dendrites were found to be preferentially oriented along the pulling direction for low pulling velocities. For larger pulling velocities, the dendrites grew first in the cooling direction but then broke as others nucleated and coarsened. The HB values of the solidified samples increased as the pulling velocity increased. In regard to sample conicity, smaller dendrites were observed for an apex angle of θ=5°, resulting in the largest HB value. This result was interpreted in terms of the favorable orientation of the dendrite along the pulling direction.
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