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Which risk increases when amorphous polymer filaments in fused deposition modeling become cooled past the glass transition by convection?

A)Delamination between printed layers occurs
B)Increased nozzle clogging from backflow
C)Thermal runaway in heated bed develops
D)Oxidation rate in filament increases

💡 Explanation

Delamination risk increases because stresses accumulate during solidification after the glass transition; the high viscosity prevents stress relaxation via viscous flow; therefore, brittle failure leading to poor layer adhesion is induced; rather than other thermal failure.

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