effect of thermoelectric magnetic convection on shrinkage
The effects of natural, forced and thermoelectric magnetohydrodynamic convection during the solidification of thin sample alloys IOP Conference Series:Materials Science and Engineering, 2015 Koulis Pericleous
Morphological and crystallographic effects of a high magnetic field on the primary Al 6 Mn phase formed during the solidification of hypereutectic Al3.25wt%Mn were investigated. Without the field, the primary Al 6 Mn crystals are mainly concentrated in the lower part and reveal a dispersed needle-like shape. In three dimension, the needles are in the form of a quadrangular prism (laterally Effect of a transverse magnetic eld on solidi cation formation of the thermoelectric magnetic convection during directional solidication under the transverse magnetic eld. I. INTRODUCTION Convection is well known to play a key role in affecting the solidication structure in solidication processing. Hence, the effective control of convection is required to achieve high-quality castings.
Effect of a transverse magnetic field on the macrosegregation and the growth of the Sn dendrite in the directionally solidified Sn-Pb alloys was investigated experimentally. The results indicated that the magnetic field modified the shape of the liquid/solid interface and the dendrite morphology significantly. Indeed, the application of the magnetic field caused the formation of the sloping Effect of a transverse magnetic field on solidification Subsequently, the quantitative experiments of the thermoelectric magnetic convection (TEMC) effect were studied. It was found that a local current due to the Seebeck effect appeared in the dendritic network, and its intensity depended on the electrical conductivity, the difference of thermoelectric (TE) power between the solid and the liquid
Jun 15, 2018 · When a magnetic field was applied, on the one hand, the static magnetic field was found to slower the fluid flow of melt due to the braking effect [21,22]; on the other hand, the thermoelectric magnetic convection (TEMC) was also observed to enhance the melt flow under a certain magnetic field [, , ]. The competition between these two effects Effect of interdendritic thermoelectric magnetic A numerical simulation was performed using finite-element code COMSOL software to investigate the thermoelectric magnetic convection (TEMC) induced by the external magnetic field. The results show that the velocity of the TEMC increases with the increasing of the magnetic
The effect of a strong magnetic field on the solid solubility and the microsegregation during directional solidification of Al-Cu alloy at lower growth speeds (1-10 mu m/s) has been investigated experimentally. Results indicate that the magnetic field causes the reduction of the grain boundary and promotes the amalgamation of the grains. Effects of Thermoelectric Magnetic Convection on the Effects of Thermoelectric Magnetic Convection on the Solidification Structure During Directional Solidification under Lower Transverse Magnetic Field This work investigated the thermoelectric magnetic convection (TEMC) during directional solidification under a transverse magnetic field numerically and experimentally.
Abstract Thermoelectric magnetic convection (TEMC) at the scale of both the sample ( L = 3 mm) and the cell/dendrite ( L = 100 m) was numerically and experimentally examined during the directional solidification of AlCu alloy under an axial magnetic field ( B 1 T ). Numerical results show that TEMC on the sample scale increases to a maximum when B is of the order of 0.1 T, and then Magnetic Convection Latest Research Papers ScienceGateMagnetic convection in a nonuniformly rotating electrically conductive medium in an external spiral magnetic field Fluid Dynamics Research 10.1088/1873-7005/abd8dc
Apr 01, 1993 · Effect of Thermoelectric Magnetic Convection on Shrinkage Porosity at the Final Stage of Solidification of GCr18Mo Steel Under Axial Static Magnetic Field Journal Article Hou, Yuan ; Shuai, Sansan ; Dong, Yuanhao ; Thermoelectric Magnetic Effect and Its Effect on the The thermo-electric currents are due to the Seebeck effect when temperature gradients exist in the material.Interaction between thermo-electric currents and static magnetic fields generate significant thermoelectric magnetic forces during directional solidification under magnetic fields. Those forces may produce various phenomena like pumping,stirring in liquid metals as well as solid motions
Apr 01, 2016 · However, the application of the static magnetic field during directional solidification of metallic alloys will gives rise to melt motion, which is called thermoelectric magnetic convection (TEMC) . The flow pattern of TEMC greatly relies on the fashion of the advancing solidliquid front (i.e., planar or cellular or dendritic interface).