Mechanical stirring influence on solute segregation during plane front directional solidification
نویسندگان
چکیده
منابع مشابه
INFLUENCE OF THE PRIMARY SOLIDIFICATION ON THE SECONDARY SOLIDIFICATION DURING SEMISOLID METAL (SSM) PROCESSING OF A356.0 ALUMINUM ALLOY BY MECHANICAL STIRRING
Abstract: The aims of this research were to investigate the effects of semisolid metal (SSM) processing parameters (i.e., shear rates –times – temperatures combinations) on the primary solidification products and isothermal holding duration, subsequent to cessation of stirring on the secondary solidification of Al-Si (A356) alloy. The dendrite fragmentation was found to be the governing m...
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A directional solidification technique was developed and applied to the problem of fractional crystallization of an iron meteorite parent body. Samples of Fe-Ni alloys close to meteorite compositions and containing S, P, and C were made. The solidified structures contain secondary phases such as sulphides within the proeutectic single crystal austenite (taenite). As a result of these experiment...
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The numerical prediction of channel segregations during two-dimensional columnar solidification of Sn-Pb alloy is analyzed when inertia is considered in the dendritic mushy zone. This contribution is included in the momentum transport equation through the quadratic Forchheimer correction term. A significant influence of the Forchheimer term in the vicinity of the liquidus region is found. The n...
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A numerical study of directional solidification has been performed using a fixed-grid front-tracking algorithm. The directional solidification of pure tin, as well as the horizontal Bridgman growth of pure succinonitrile, were investigated. In both cases, the growth front was stable and non-dendritic, but was significantly distorted by the influence of convection in the melt and, for the Bridgm...
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Research involving the interaction of flow with morphological instability during directional solidification of binary alloys is reviewed. In general, flow may arise during the solidification process from thermal and solutal buoyancy, changes in density upon solidification, thermocapillary forces at free boundaries, or external forcing of the system. We focus primarily on the last of these, givi...
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ژورنال
عنوان ژورنال: International Journal of Thermal Sciences
سال: 2018
ISSN: 1290-0729
DOI: 10.1016/j.ijthermalsci.2017.12.024