Discontinuities in wrought products are typically oriented in which direction?

• A. In the direction of grain flow
• B. Randomly
• C. At right angles to the entry surface
• D. At right angles to the grain flow

Answer: (A)

Discontinuities in wrought products tend to align with the direction in which the metal has been deformed during processing. When metals are rolled, forged, or extruded, the grains elongate and orient themselves along the flow direction. This same deformation environment also tends to situate defects—such as seams, pores, and inclusions—along that flow path, producing planar discontinuities that run parallel to the grain flow. Therefore, the typical orientation is along the direction of grain flow, rather than randomly or perpendicular to it.