3D DMLS is similar to which process?

• A. Fused deposition modelling
• B. Stereolithography
• C. Laser-based brazing
• D. Laser beam welding

Answer: (D)

DMLS uses a laser to sinter metal powder, building a part layer by layer by fusing metal particles with a focused laser beam. The closest comparison is laser beam welding, because both rely on directed laser energy to heat metal to its fusion point and create a solid, joined region. The key idea is using a laser as a heat source to achieve metal fusion.

FDM and SLA are polymer-based processes that use different mechanisms (extrusion of thermoplastics or photopolymer curing) and materials, so they aren’t as closely related. Laser-based brazing also uses a laser, but its goal is to join pieces with filler material rather than build up a part from powder, making it less analogous to the additive, layer-by-layer nature of DMLS.