In 2025–2026, Ultrasonic Additive Manufacturing (UAM) enables solid-state bonding of metal foils through ultrasonic vibrations at temperatures well below melting point. UAM uniquely combines additive lamination with CNC subtractive machining in a single hybrid process, enabling multi-material structures and embedded electronics impossible with any other metal AM technology.
Principle: Ultrasonic Solid-State Bonding
- Metal Foil: Thin metal tape (50–250 μm) of aluminum, copper, titanium, or steel is placed on the substrate.
- Ultrasonic Horn (Sonotrode): A vibrating horn (20–40 kHz) presses and vibrates the foil with 500–3000 N normal force.
- Solid-State Bonding: Ultrasonic vibrations disrupt surface oxide films, create local plastic deformation, and form metallurgical bonds without melting (temperature < 50% of $T_m$).
- CNC Milling: After every N laminated layers, CNC mills contours to exact geometry.
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PLA filament
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Unique UAM Capabilities
- Multi-Material: Bond different metals in one part (Al + Cu, Ti + steel).
- Electronics Embedding: Low temperature (< 150°C) allows embedding sensors, optical fibers, and wiring inside metal structures.
- Integrated Channels: CNC between layers creates internal cooling/hydraulic channels.
Comparison with Other Metal AM
| Property | UAM | PBF-LB | WAAM | Cold Spray |
|---|---|---|---|---|
| Temperature | < 50% $T_m$ | > $T_m$ | > $T_m$ | < $T_m$ |
| Porosity | ~0% | < 0.5% | 1–3% | 1–5% |
| Multi-Material | Excellent | Limited | Limited | Moderate |
| Embed Electronics | Yes | No | No | No |
Pros and Cons
Pros:
- Low Temperature: Embed sensitive components.
- Multi-Material: Bond dissimilar metals.
- Zero Porosity: Solid-state process.
Cons:
- Low Volume Rate: Thin foils (50–250 μm) → slow for large volumes.
- Limited Geometry: Primarily block-like structures with CNC finishing.
FAQ
Ultrasonic Additive Manufacturing (Uam): Metal Foil Lamination Calculator
Interactive optimization calculator.
The full picture
This article is one page from The Big Book of 3D Printing: 704 illustrated pages covering every technology, material and fix in one reference.
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Updated on 11 September 2026
This article was written with AI assistance; the facts were checked against the sources on 11 September 2026.