Italian Project Recycles Car Scrap into 3D Printable Aluminum
Valland's ToZero project successfully transforms recycled automotive aluminum scrap into powder for laser powder bed fusion, significantly reducing a demonstrator part's carbon footprint.
The ToZero project, a collaboration between Valland, Politecnico di Torino, Politecnico di Bari, and Fontana Group, has demonstrated the feasibility of converting recycled automotive aluminum scrap into a powder suitable for laser powder bed fusion (LPBF) additive manufacturing.
Valland, responsible for the additive manufacturing aspects, developed and tuned LPBF parameters for the reclaimed AA5083 aluminum powder. They used this material to produce a structural connecting node, named "Voletto," which was modeled after a component found in automotive bodies. The printing process using the recycled alloy did not result in hot cracking, and the mechanical strength and ductility of the printed part met the project's targeted specifications.
Design optimization was also a key element, with topology work reducing the "Voletto" part's mass from an initial 1.68 kg down to a target of 0.8 kg. A life-cycle assessment, compliant with ISO 14040/44 standards, attributed a significant reduction of approximately 73% in the component's carbon footprint to the optimized production process, highlighting the potential of recycled feedstock in additive manufacturing supply chains.
Despite these advancements, Valland acknowledged a remaining challenge: the recycled AA5083 powder prints at a notably slower rate compared to commercially available AlSi10Mg, a common aluminum alloy for industrial LPBF. The company identifies the balance between material quality and printing productivity as the critical issue to resolve before the technology can be widely adopted at an industrial scale, with print speed being the primary barrier to commercial viability.
This development is significant as it directly addresses the additive manufacturing industry's push towards sustainable material sourcing by utilizing recycled automotive scrap. While demonstrating reduced carbon footprint and acceptable mechanical properties, the slower print speed highlights a common challenge in scaling recycled materials. Overcoming this productivity gap is crucial for widespread adoption, especially in sectors like automotive and aerospace seeking to integrate AM into mass production while meeting environmental goals.
Edited by the news editor with AI from the original report — please refer to the original source.