2014 A quantitative study of the cellular or dendritic hexagonal arrays, obtained during upward solidification of Pb-30 wt% T1 alloys, is presented. These arrays are reconstituted by the Wigner-Seitz method which allows the determination of the primary spacing, the identification of the defects and the analysis of the disorganization of the interface structures by using concepts developed for t...

in the present work, a meshless method called finite point method (fpm) is developed to simulate the solidification process of a continuously cast steel bloom in both primary and secondary cooling regions. the method is based on the use of a weighted least-square interpolation procedure. a transverse slice of the bloom moving at casting speed is considered as the computational domain and two di...

An enhanced mixed formulation, based on the general form of the enthalpy, is proposed for phase change problem with convection. This formulation presents the advantage to consider both equal and different liquid-solid physical properties. A fully implicit second order accurate temporal and spatial finite element discretizations is also employed. The numerical simulations for water solidificatio...

We are interested in modelling the dendritic growth occurring during the solidification process of a pure material and especially to see the effect of the cooling / heating on the growth behaviour of this dendrite. For this purpose we use a phase-field model. The obtained partial differential equations are solved numerically by a finite difference method. In order to appreciate the shape of the...

We compute time-dependent solutions of the sharp-interface model of dendritic solidification in two dimensions by using a level set method. The steady-state results are in agreement with solvability theory. Solutions obtained from the level set algorithm are compared with dendritic growth simulations performed using a phase-field model and the two methods are found to give equivalent results. F...

In the present work, heat transfer coefficients (h) along different cooling zones of a continuous caster billet machine were determined during casting of low and medium carbon steels. The effects of casting parameters, such as machine characteristics, the ingot dimension, mold, sprays zones, radiant cooling, melt composition and casting temperature were investigated and correlated with heat tra...

Effects of different pressures on the isothermal-solidification process pure Al were studied by molecular dynamics (MD) simulation using embedded-atom method (EAM). was first subjected to a rapid-cooling process, and then it annealed under conditions. Mean first-passage times (MFPT) method, Johnson-Mehl-Avrami (JMA) law, X-ray diffraction (XRD) analysis used qualify solidification- kinetic proc...

Gas Metal Arc Welding (GMAW) process was analyzed by combining a finite element thermomechanical model for temperature and stress with solidification model. Model prediction was compared with experimental data in order to validate the model. The effects of welding process parameters on these welding fields were analyzed and reported. The effort to correlate the residual stress and solidificatio...