FERROUS ALLOYS HYPOEUTECTIC GRAY CAST IRON GRAPHITE MORPHOLOGY THIXOFORMING THERMODYNAMIC CHARACTERIZATION THIXOFORMABILITY DSC MATERIALS CHARACTERIZATION ALUMINIUM SILICON ALLOYS RHEOLOGICAL BEHAVIOUR MICROSTRUCTURAL CHARACTERISATION DTA PHASE DIAGRAM ALUMINIUM ALLOYS RHEOLOGY CALPHAD ALUMINIUM TITANIUM ALLOYS RHEOCASTING SEMISOLID MATERIALS MAGNESIUM ALLOYS