Cast aluminum components are used for many diverse functions, from applications that do not have critical service requirements to components for aerospace and automotive applications that require high strength, ductility and fatigue properties. The melting and casting process can play a major role in the final component properties. Molten aluminum is prone to picking up hydrogen gas and oxides and is sensitive to minor trace elements. Enhanced mechanical properties can be provided by tight melt control and specialized molten metal processing techniques, including the control of hydrogen gas porosity during melting. Casting designers with a good understanding of how aluminum gas porosity is controlled will gain further insight into the full capabilities of aluminum casting.
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