Can you 3D print Damascus steel? Pretty much, yeah

Enlarge / The light-colored layers in this 3D printed block are much harder steel, while the dark layers in between are more ductile. (credit: Frank Vinken)

Damascus steel-and modern versions of the steelmaking technique-is generally synonymous with artisan forgework. In traditional Japanese sword-making, for example, the steel is repeatedly folded to produce hundreds or thousands of alternating layers, producing intricate patterns in the finished product. That's not just for the visual effect-the layers alternate between hard-but-brittle and more flexible steel, combining for the best of both worlds.

A new study led by Philipp Kurnsteiner of the Max Planck Institute for Iron Research shows that it is possible to do something very similar with laser additive manufacturing-3D printed metals.

Traditional folded steels combined two steels that varied by carbon content and in their microscale structure, which is controlled by how quickly it cools (by quenching). In this case, the researchers were using a nickel-titanium-iron alloy steel that works well with these 3D printing techniques, in which metal powder is fed onto the work surface and heated with a laser.

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