Discussion
The "Earing" phenomenon in metal forming is associated with
Answer: A
Earing is associated with deep drawing.
When a circular blank of sheet metal is deep drawn into a cup, the rim often develops wavy peaks and troughs called ears. They arise from planar anisotropy of the sheet: its plastic strain ratio differs with direction relative to the rolling direction, so the metal flows unevenly and the cup wall ends up taller in some directions. The ears must then be trimmed off, wasting material.
Rolling creates the anisotropy (through crystallographic texture) but does not itself produce ears. Extrusion and forging do not involve drawing a flat blank into a cup.
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