The 750 mm water-cooled multi-material nozzle demonstrator is a published Exafuse example of thin-wall LMD, material zoning and long-build planning. It combines Inconel 625 in the inner structure with Inconel 718 in the outer structure and cooling ribs.
Case snapshot
| Component | 750 mm water-cooled multi-material nozzle demonstrator |
|---|---|
| Materials | Inconel 625 inner structure; Inconel 718 outer structure and cooling ribs |
| Public build context | Thin-wall context around 1.8 mm, around 50 hours and more than 1,070 layers |
| Purpose | Show material zoning, path planning and long-build discipline before production claims |
Why this is more than a tall part
The technical challenge is the combination: thin walls, different Ni-based material zones, cooling features, long build time and validation boundaries. A buyer can learn how LMD connects geometry, material function and process stability, while still treating the result as a demonstrator until application-specific qualification is complete.
Demonstrator route
- Define the functional regions and material zones.
- Plan thin-wall deposition and cooling-rib geometry.
- Run the long LMD build while managing process stability.
- Review geometry, material transition logic and inspection needs.
- Use the result as published project context, not as a universal qualification statement.
What this proves
- Exafuse has published a 750 mm multi-material LMD demonstrator.
- Thin-wall geometry, material zoning and long-build planning can be discussed together.
- The case gives buyers a concrete reference when asking about process-equipment or nozzle-like parts.
What this does not prove
- It does not mean every thin-wall or cooled geometry is automatically feasible.
- It does not publish process parameters, internal inspection reports or qualification data.
- It does not replace application-specific pressure, thermal, fatigue or acceptance review.
What to send for a comparable review
- CAD with clearly marked material zones and cooling or flow features.
- Base material or target alloy families and why each zone needs them.
- Overall dimensions, wall targets, finishing allowance and inspection needs.
- Operating temperature, pressure, media or duty context where relevant.
- What the first demonstrator must prove before further qualification.
Technical overview
| Project | 750 mm multi-material LMD nozzle demonstrator case |
|---|---|
| Focus | Thin-wall LMD, material zoning, Inconel 625 / Inconel 718 and long-build planning |
| Suitable when | Large process-equipment demonstrators where material zones and geometry are the learning target |
| Less suitable when | Requests that need certified performance before demonstrator evidence exists |
| Related service | Metal additive manufacturing |
| Related article | 750 mm nozzle article |
| Project-specific limits | Demonstrator context; production use still needs application-specific validation. |
