Which description fits a 'lap' defect in metal processing?

A 'lap' defect in metal processing is accurately described as a surface defect that resembles a fold. This type of defect occurs when the metal surface is not completely bonded, often due to improper processing or handling, leading to the formation of folds or laps that can catch and trap foreign materials. This can compromise the surface integrity and overall performance of the metal.

The appearance of a lap is typically characterized by a raised area that looks like a fold, differentiating it from other types of defects that may involve cracks, voids, or linear flaws. Understanding such defects is crucial for quality assurance in metal manufacturing, as their presence can significantly impact the material's strength and durability.