Arc-based Directed Energy Deposition / WAAM

DED process using an electric arc to melt metal wire. WAAM (Wire Arc Additive Manufacturing) is the most widely known and commercially important variant.

Operating Principle & Process Flow

Operating Principle: A standard welding process (MIG/MAG, TIG, CMT, Plasma) is automated on robotic kinematics to build up a part bead by bead.

Process Flow: Arc ignition between electrode/wire and substrate → Wire melts off → Motion system (robot) shapes the part.

Technical Specifications

  • Energy Source: Electric arc (plasma, MIG, TIG, CMT).
  • Feedstock / Material Feed: Metal wire.
  • Typical Part Size: Medium to enormous (theoretically unlimited, often several metres long).
  • Build Rate: Very high (typically 1–10 kg/h, sometimes more).
  • Accuracy: Low (±1–2 mm).
  • Surface Quality: Very rough (pronounced weld bead structure).

Applications & Materials

Typical Materials: Steels, aluminium, titanium, copper and nickel alloys.

Typical Applications: Ship propellers, bridge components, large tools, excavator bucket repairs.

Industries: Shipbuilding, civil engineering, heavy machinery, oil & gas.

Related Whitepapers & Technical Articles

WAAM vs. DED vs. PBF – The big technology comparison

Which process is suitable for which application? A detailed technical and economic comparison.

Read PDF

Metal 3D printing in the maritime industry

WAAM propellers and spare parts “on-demand” on the high seas.

Read PDF

Cold Metal Transfer (CMT) in the WAAM process

Cold, spatter-free and precise: How oscillating welding wires tame large-format printing.

Read PDF

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