Articles - KEY to METALS • Nonferrous Knowledge Base

Casting Defects: Hot Tearing

One of the main casting defects is hot tearing or hot cracking, or hot shortness. Irrespective of the name, this phenomenon represents the formation of an irreversible failure (crack) in the still semisolid casting. Although in most works hot tearing is considered as a phenomenon linked to the inadequate compensation of solidification shrinkage by melt flow in the presence of thermal stresses, there are more factors that could be involved in the formation of cracks at supersolidus temperatures.


Spray Rolling of Aluminum Strip

Spray rolling is a relatively new strip-casting technology, being developed, that combines elements of spray forming and twin-roll casting. In ay rolling, molten metal is atomized with a high velocity inert gas, the resultant droplets are quenched in flight, and the spray deposits onto mill rolls.