Crack: the surface of the wire longitudinal cracking, crack, crack.
Tension fracture: wire visible surface appear lateral strip crack, showing barbed tongue or other shapes
Hierarchical: a partial longitudinal wire or through long division.
Scarring (scar spot): yellow wire surface oxidation scars appear white lime scar.
Pull marks: steel surface presence of significant small longitudinal grooves or ridges, in only slight surface rendering is not smooth shiny phenomenon.
Folding: the surface of the metal wire along the longitudinal direction of the overlap now Juan. Often has a linear shape, but also the formation of a curve or zigzag. When metallographic examination, usually iron oxide inclusions and decarburization layer fold.
Concave surface: local depression on the wire surface.
Corroded: steel surface partial and overall oxidation.
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