Visual Testing (VT) Practice Exam

Which discontinuity is typically found in forgings?

1. shrinkage

2. bleed-out

3. laps

4. undercut

The correct answer is: laps

In the context of forgings, laps are a type of discontinuity that can occur when the material flows over itself during the forging process. This can happen when the forging is not designed properly or when insufficient pressure is applied, preventing the material from fully bonding together. Laps appear as thin, flat folds of metal that are not fully fused, which can compromise the integrity and strength of the forged part. Understanding laps is crucial in visual testing because they indicate potential weaknesses in the material. Proper inspection and identification of laps can help ensure that the final product meets the required performance standards and safety regulations. By recognizing this defect, technicians can initiate corrective actions, ensuring that the forging process produces reliable components.