Invention Reference Number
Automotive aluminum scrap often contains elevated impurity levels that reduce ductility and limit reuse in structural components. With rising demand for lightweight materials and the growing volume of secondary aluminum, a method to convert low-grade scrap into higher-performance products is needed. ORNL has demonstrated that a unique additive manufacturing–based process can upcycle low-grade automotive aluminum scrap into structural components with improved mechanical performance, enabling a more energy-efficient and cost-effective materials supply chain.
Description
This technology introduces a novel approach for transforming low-grade automotive aluminum scrap into higher-value structural materials through a tailored additive manufacturing workflow. The process uses a proprietary combination of melting, powder preparation, and powder-bed additive fabrication to convert variable-quality scrap into components with enhanced strength-ductility performance. This method accommodates impurity levels commonly found in automotive waste streams while generating microstructures not typically achievable in conventional remelting or die-casting routes.
Demonstrations with representative scrap-derived alloys showed strong processability across a broad range of additive manufacturing conditions, yielding mechanical properties that outperform typical secondary aluminum alloys and rival those of certain primary materials. Performance can be further tuned using post-processing pathways that optimize material behavior without revealing precise compositions or processing schedules.
Overall, the invention establishes a pathway to create a domestic, higher-value aluminum supply chain by upcycling scrap that would normally be exported or downcycled, enabling the production of complex, lightweight structural components from low-cost feedstocks.
Benefits
- Converts low-value aluminum scrap into higher-performance structural material
- Reduces reliance on primary aluminum production
- Enables lightweight, complex geometries via additive manufacturing
- Improves material properties despite impurity variations
Applications and Industries
- Structural automotive components
- Lightweight mobility systems
- Transportation manufacturing
Contact
To learn more about this technology, email partnerships@ornl.gov or call 865-574-1051.
