Fraunhofer IGCV Prints Multi-Material Rocket Parts in One Shot, Saving Weeks of Development

Printing Two Metals at Once

Engineers at the Fraunhofer Institute for Casting, Composite and Processing Technology (IGCV) in Augsburg have been pushing a deceptively simple idea: why print a rocket part from one material when you could print it from several at the same time? Using laser powder bed fusion, the team fuses two or more powder materials, different metals or alloys, in a single build, layering magnetic and non-magnetic steels into one monolithic component.

A Valve That Keeps Rockets Pointed Straight

To prove it works, the researchers printed a demonstrator valve component built from alternating magnetic and non-magnetic steel alloys. The point is not cosmetic. That material gradient helps keep a rocket stably aligned during flight, a job normally split across separately manufactured and joined parts. Lab tests confirmed the part's high density and precise material distribution, hitting the performance bar required of the real component.

Weeks Off the Development Clock

The bigger story is speed. Because the geometry lives entirely on a computer, engineers can adjust a component and print the new version almost immediately, with no retooling and no waiting on a machine shop to mill and weld separate pieces. Fraunhofer estimates the savings for rocket-engine development run to weeks, not days, every time a design changes.

The team is now pitting its 3D-printed prototype directly against a conventionally milled-and-welded version, benchmarking functionality, efficiency, cost, and cycle time. The goal is to make the case for the technique on the next generation of Ariane engines, Europe's workhorse launch vehicles.

Why Multi-Material Printing Is Having a Moment

Fraunhofer's work sits inside a broader surge of interest in printing parts with graded material properties, harder here, more corrosion-resistant there, in a single pass. For aerospace, where every gram and every week counts, that flexibility is exactly what is needed to iterate fast on propulsion hardware. If the side-by-side tests land as expected, do not be surprised to see graded metal valves and similar components become a standard tool in the rocket engineer's kit.