TFA Repaso MC

Process is carried out in vacuum, an electrode is heated to the melting point, drops of liquid metal that fall from the electrode face are collected in a lower crucible and rapidly solidified.

• Vacuum Arc Remelting

• Direct Chill Casting

• Electroslag Remelting

• Vacuum Induction Melting

An ____ is formed when two or more elements mix with each other in a crystalline lattice. Atoms of one element enter the lattice of a second element, forming a kind of partnership.

Are a result of the solidification process and occur as a result of the misorientation of the grains as they are frozen into position. Thus, are regions with many irregularly placed atoms, dislocations, and voids.

• Grain boundaries

• Lattice structure

• Atomic arrangement

• Polycrystalline materials

Process where molten metal is extracted through the bottom of a water-cooled mold producing fine grained ingots with a minimum amount of segregation.

• Vacuum Arc Remelting

• Direct Chill Casting

• Electroslag Remelting

• Vacuum Induction Melting

Process that utilizes electric currents to heat a crucible filled with solid metal (pure metal, master alloys ans recycled scrap) and eventually melt the metal within a vacuum chamber.

• Vacuum Arc Remelting

• Direct Chill Casting

• Electroslag Remelting

• Vacuum Induction Melting

Are an essential tool in understanding the effects of alloy composition, solidification, and solid-state thermal processing on the microstructure of alloys, and are often used to determine solidification and melting temperatures, the solidification path, and the resulting equilibrium phases that form as well as their chemical compositions.

How does melting work in alloys?

• They have a melting point

• They have a melting range

Process is performed by lowering a consumable electrode into a molten flux, heat is generated by an electrical current, metal droplets fall through the liquid flux and are collected in a water-cooled mold.

• Vacuum Arc Remelting

• Direct Chill Casting

• Electroslag Remelting

• Vacuum Induction Melting

Which of the following options is the first stage in solidification

• Cristallization

• Mushy zone

• Dendritic growth

• Nucleation

Select materials used for expendable molds in casting

• cast iron

• foam

• wood

• wax