Which statement is true about post-processing in AM?

Which statement is true about post-processing in AM?

• A. Post-processing is often required
• B. Post-processing is never required
• C. Post-processing eliminates finishing steps
• D. Post-processing adds no time or cost

Answer: (A)

Post-processing after printing is often required to make AM parts meet final specifications. Additive manufacturing parts usually come with challenges like support structures, visible layer lines, surface roughness, and potential internal defects or residual stresses. Removing supports, smoothing or finishing the surface, drilling or machining to tight tolerances, cleaning, sealing, and sometimes heat treating to relieve stresses or improve strength are common steps in post-processing. Because of these typical needs, post-processing is not optional and is a usual part of turning a printed part into a usable product. The other statements don’t fit because some prints do need post-processing, post-processing does not replace finishing steps—it often adds them—or reduce them, and it does add time and cost to the overall process.

Post-processing after printing is often required to make AM parts meet final specifications. Additive manufacturing parts usually come with challenges like support structures, visible layer lines, surface roughness, and potential internal defects or residual stresses. Removing supports, smoothing or finishing the surface, drilling or machining to tight tolerances, cleaning, sealing, and sometimes heat treating to relieve stresses or improve strength are common steps in post-processing. Because of these typical needs, post-processing is not optional and is a usual part of turning a printed part into a usable product. The other statements don’t fit because some prints do need post-processing, post-processing does not replace finishing steps—it often adds them—or reduce them, and it does add time and cost to the overall process.