Which term describes a discontinuity that forms when excess metal flows and overlies another surface during forging?

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Multiple Choice

Which term describes a discontinuity that forms when excess metal flows and overlies another surface during forging?

Explanation:
In forging, a lap is a surface discontinuity that happens when extra metal is squeezed and ends up flowing over an edge to lie atop an adjacent surface, creating a raised overlap or lip. You’ll see a visible ridge along the workpiece where the metal has overlapped the underlying surface. This directly matches the idea of excess material flowing and sitting over another surface. The other terms don’t describe that exact condition: a seam is more about two parts meeting to form a line, rolled-in-scale refers to scale embedded in the surface, and a gouge is a deep groove cut into the material.

In forging, a lap is a surface discontinuity that happens when extra metal is squeezed and ends up flowing over an edge to lie atop an adjacent surface, creating a raised overlap or lip. You’ll see a visible ridge along the workpiece where the metal has overlapped the underlying surface. This directly matches the idea of excess material flowing and sitting over another surface. The other terms don’t describe that exact condition: a seam is more about two parts meeting to form a line, rolled-in-scale refers to scale embedded in the surface, and a gouge is a deep groove cut into the material.

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