Shear Assisted Processing and Extrusion of Unhomogenized Aluminum Alloy 6063 Castings with High Iron Content

Conference · Thu Feb 09 04:00:00 EST 2023

DOI:https://doi.org/10.1007/978-3-031-22532-1_45· OSTI ID:1970143

Whalen, Scott A. ^[1]; Overman, Nicole R. ^[1]; Taysom, Brandon S. ^[1]; Reza E Rabby, MD ^[1]; Skszek, Timothy W. ^[1]; Diciano, Massimo ^[2]

---

1. BATTELLE (PACIFIC NW LAB)
2. CRADA Partner

Shear Assisted Processing and Extrusion (ShAPE) was used to fabricate aluminum 6063 tubing directly from secondary scrap. Trimmings from an automotive manufacturing facility were cast into billets spiked with iron (0.3 wt% Fe) to explore the tolerance of ShAPE to Fe contamination. Billets were extruded in the unhomogenized condition to form tubing with an outer diameter of 12 mm and wall thickness of 2 mm. Tensile properties reached 0.2% YS = 206 MPa, UTS = 238 MPa, and U.E. = 16.3% in the T6 temper. Performance exceeds the ASTM minimum standard and is on par with ASM typical values for conventional extrusion of primary aluminum billets in the fully homogenized condition. Microstructural characterization shows extensive refinement of grain size along with dispersion and refinement of Fe-Al-Si intermetallic phases. This study suggests that ShAPE extrusion may offer a lower carbon manufacturing pathway through direct recycling of secondary aluminum scrap and elimination of the billet homogenization step.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1970143
• Report Number(s): PNNL-SA-177354
• Country of Publication: Switzerland
• Language: English

Related Subjects

solid phase processing
AA 6063
extrusion
Shear assisted processing and extrusions (ShAPE)
Aluminum