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Which post-processing step is commonly required for metal 3D printed parts to relieve internal stresses?
- Painting
- Heat Treatment
- Polishing
- Coating
Answer: Heat Treatment
Heat treatment (annealing, stress relieving) reduces residual stresses from rapid melting/solidification in metal AM, improving dimensional stability and mechanical properties. Other post-processing: support removal, machining, surface finishing. Critical for qualifying AM parts for aerospace/medical applications. Important for manufacturing process questions.