Development of a Castable High Strength Secondary Aluminum Alloy from Recycled Wrought Aluminum Scrap
- Univ. of Illinois at Urbana-Champaign, IL (United States). Illinois Applied Research Institute
- Eck Industries, Inc., Manitowoc, WI (United States)
A new process for recycling scrap AA7075 aerospace alloys directly into a high strength castable secondary alloy is demonstrated. The process involves enhancing the castability of the utilized primary wrought aluminum scrap feedstock by scrap alloy chemistry optimization and zirconium additions in order to mitigate the inherent hot tearing tendency of 7075 alloys. By utilizing the new process, the hot tearing index of scrap AA7075 was reduced from 26 to 4. Defect-free castings were obtained in pilot-scale castings trials. The developed secondary 7075 alloy also satisfied preset target mechanical properties with strength levels exceeding 250 MPa and elongation levels higher than 3%. The validity of the new approach and its readiness for transition to commercial practice was demonstrated by casting cylinder heads directly from the modified 7075 scrap.
- Research Organization:
- Univ. of Illinois at Urbana-Champaign, IL (United States); REMADE Institute of Sustainable Manufacturing Innovation Alliance Corporation, West Henrietta, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Materials & Manufacturing Office (AMMTO)
- DOE Contract Number:
- EE0007897
- OSTI ID:
- 1872215
- Report Number(s):
- DOE-UIUC-0007897; 18-02-MM-09
- Country of Publication:
- United States
- Language:
- English
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