Also called postweld heat treatment cracking, stress-relief cracking occurs when susceptible alloys are suhjected to thermal stress relief after welding to reduce residual stresses and improve toughness. Stress-relief cracking occurs only in metals that c ...

An alloy having an amorphous or glassy structure. See also amorphous solid.

The occurrence of embrittlement in a material below the melting point of the embrittling species. See also liquid-metal embrittlement.

Having an amenity for oil. See also hydrophilic and hydrophobic.

Waste waters containing fetid materials, usually sulfur compounds.

Heat treatment carried out in steel to reduce internal stresses.

The potential of an electrode in an electrolytic solution when the forward rate of a given reaction is exactly equal to the reverse rate. The equilibrium potential can only be defined with respect to a specific electrochemical reaction.

A solution or process used to loosen or remove corrosion products such as scale or tarnish.

A type of wear that occurs between tight-fitting surfaces subjected to cyclic relative motion of extremely small amplitude. Usually, fretting is accompanied by corrosion, especially of the very fine wear debris.

A range of corrosion potential values in which unacceptable corrosion resistance is achieved for a particular purpose.

A thermal spraying process in which the coating material is melted with heat from a plasma torch that generates a nontransferred arc: molten coating material is propelled against the base metal by the hot, ionized gas issuing from the torch.

Current flowing through paths other than the intended circuit.

(1)An isothermal reversible reaction in which a liquid solution is converted into two or more intimately mixed solids on cooling, the number of solids formed being the same as the number of components in the system. (2) An alloy having the composition ind ...

A coating process whereby thermally emitted electrons collide with inert gas atoms, which accelerate toward and impact a negatively charged electrode that is a target of the coating material. The impacting ions dislodge atoms of the target material, which ...

A galvanic cell caused by a difference in metal ion concentration at two locations on the same metal surface.

Descriptive treatment of fracture, especially in metals, with specific reference to photographs of the fracture surface. Macrofractography involves photographs at low magnification (< 25x); microfractography, photographs at high magnification (>25x)

(1) The application of an electrically conductive metallic layer to the surface of nonconductors. (2) The application of metallic coatings by nonelectrolytic procedures such us spraying of molten metal and deposition from the vapor phase.

The stress condition in linear elastic fracture mechanics in which the stress in the thickness direction is zero; most nearly achieved in loading very thin sheet along a direction parallel to the surface of the sheet. Under plane-stress conditions, the pl ...

An obsolete term describing oil or grease coatings used to provide temporary protection against atmospheric corrosion.

See corrosion potential and open-circuit potential.