Precipitation of aluminum nitride may also play an important role in this type of fracture.
The barrier may be a thin film containing at least one of a nitride , oxide, boride, silicide, carbide and aluminide.
Nitrogen may be introduced into the surface of the steel by nitriding .
Today's silicon steels use MnS as the grain growth inhibitor, but other compounds, such as carbides, oxides, or nitrides , are also effective.
Titanium increases the efficiency of niobium because it combines with the nitrogen-forming titanium nitrides, thus preventing the formation of niobium nitrides .
When these steels are nitrided the aluminum forms AlN particles, which strain the ferrite lattice and create strengthening dislocations.
A roof-area cross-member is nitrided (bonding titanium and nitrogen to the parent steel after stamping) to raise its tensile strength to 145,000 lbs/sq.-in.
It is interesting to note that this is also true of a number of nitrides and borides.
Carbonitriding is a modified form of gas carburizing, rather than a form of nitriding .