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Stress corrosion cracking (SCC) is the growth of crack formation in a corrosive environment. It can lead to unexpected and sudden failure of normally ductile metal alloys subjected to a tensile stress, especially at elevated temperature. SCC is highly chemically specific in that certain alloys are likely to undergo SCC only when exposed to a ...
This alloy usually contains a minimum of 20 percent aluminum. Conventional case depth for carbon and alloy steel is 0.0127-0.0508 centimeters, and for stainless and nickel base alloys is 0.00508-0.0254 centimeters. [7] After cooling, the metal is removed from the retort and from the excess powder.
Magnesium wheels were originally used for racing, but their popularity during the 1960s led to the development of other die-cast wheels, particularly of aluminium alloys. The term "mag wheels" became synonymous with die-cast wheels made from any material, from modern aluminium alloy wheels to plastic and composite wheels used on items like ...
A casting defect is an undesired irregularity in a metal casting process. Some defects can be tolerated while others can be repaired, otherwise they must be eliminated. They are broken down into five main categories: gas porosity, shrinkage defects, mould material defects, pouring metal defects, and metallurgical defects.
In addition, magnesium increases the elongation at break. In contrast to AlSiCu, which can also be hardened, these alloys are corrosion-resistant and easy to cast. However, copper is present as an impurity in some AlSiMg alloys, which reduces corrosion resistance. This applies above all to materials that have been melted from secondary aluminium.
Cast aluminium alloys yield cost-effective products due to the low melting point, although they generally have lower tensile strengths than wrought alloys. The most important cast aluminium alloy system is Al–Si, where the high levels of silicon (4–13%) contribute to give good casting characteristics. Aluminium alloys are widely used in ...
Aluminium–copper alloys (AlCu) are aluminium alloys that consist largely of aluminium (Al) and traces of copper (Cu) as the main alloying elements. Important grades also contain additives of magnesium , iron , nickel and silicon ( AlCu(Mg, Fe, Ni, Si) ), often manganese is also included to increase strength (see aluminium-manganese alloys ).
Dealuminification is a corresponding process for aluminum alloys. Similar effects for different metals are decarburization (removal of carbon from the surface of alloy), decobaltification, denickelification, etc. The prototypical system for dealloying to create nano-porous metals is the np-Au system, which is created by selectively leaching Ag ...