Segregation of copper in an Fe–Cu alloy under pulsed electric current

Abstract

Effect of electric current on the segregation of copper precipitates in the Fe-13.6Cu alloy is evaluated. Results of this approach present two stages of segregation, namely, grain-boundary segregation during the solidification and interphase segregation during the decomposition of a solid solution. The segregation becomes apparent not only because the thermodynamic barrier for segregation is decreased, but also because the diffusion is greatly enhanced. Based on the thermodynamic and kinetic aspects, the segregation process under electric current would be of great interest and of physical importance because this kind of electric currentinduced segregation was much stronger than the thermal diffusion segregation.

Application of pulsed electric current in immiscible liquid and droplet processing

“…From above critical literature review, the pulsed electric current is energy and time effective [11][12][13][14][15][16][17][18][19][20]; so the application of pulsed electric current with low voltage could be applied for the emulsion-based immiscible liquid and droplet processing. The potential contribution of the electromagnetic field in dropletbased microfluidic system [21][22][23][24] is significant with different complex phenomena [36,37].…”

“…The review has been divided into four sections. The potential application of pulsed electric current in material processing has been explored from the existing literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Research [21][22][23][24] shows that the application of electromagnetic field for dropletbased microfluidic materials is significant with complex phenomena, such as dielectrophoresis (DEP) and electromagnetophoresis.…”

Artificial neural network study of the electrical conductivity of mould flux

“…The recent environment regulation on carbon neutral steelmaking promotes the electrification of continuous casting. Electric field affects materials segregation [10], viscosity [11], distribution of oxide inclusions [12] and surface roughness in the cast mould [13]. This demands an analytical expression to represent the relationship between the chemical constitution, temperature and electrical conductivity of the system.…”

The Role of Electric Current-Associated Free Energy and Forced Convection on Grain Refinement in Pure Aluminum under Electropulsing

“…Electric current, passing through a conductor, induces an additional term G e for the system free energy compared with that without electric current [24,25]. Experiments and theoretical analysis have proved that a significant effect of electric current-associated free energy change (Δ G e ) on the microstructural improvement in materials, such as segregation of inclusions or solute precipitates in alloys [24,26], solid state phase transformations [25], fragmentation of lamellar structure of pearlitic [27] and separation of electrically neutral particles in liquids [28]. Here, it should be noted that there is a striking common feature: the formation of object has different electrical resistivities from that of the matrix.…”