This thesis deals with the heat evolution during solidification and its relation to the formation of porosity. It intends to improve the current understanding of the formation of porosity in cast materials with special interest in nodular cast iron and the spray forming process. Two different systems, a Fe-based alloy, Cast iron, and a Ni-based alloy, Inconel 625, are examined. The effect on th...

Since the cutting tools used in machining process of super alloys are subjected to high cutting forces, accordingly tools life is reduced, therefore improvement in alloys machining and reducing cutting forces to achieve longer tools life is an essential necessity. In this research, the effect of changes in feed rate on cutting forces in machining process of nickel based super alloys is investig...

Abstract. A series of calculations and measurements have been made to evaluate the effect of eddy currents in the spherical tokamak ETE (Experimento Tokamak Esférico). Eddy currents occur in the central column of the conventional copper toroidal field magnet, around which the ohmic heating solenoid was tightly wound, and in the continuous wall of the vacuum vessel manufactured from inconel allo...

Arc ablation holds the promise of fast, low-cost metal removal at faster rates than laser, plasma and electron-beam methods and without the tooling and fixturing forces of conventional machining. Preliminary results show surface finishes in the tens of microns range at high material removal rates (MRRs) by adaptive control of arc voltage: up to 97 mm3/sec at 4 kW. These results far exceed the c...