Solid Phase Processing of Mg-Al-Mn-Ca for High Strength and Ductility

Conference · Mon Feb 06 04:00:00 EST 2023

DOI:https://doi.org/10.1007/978-3-031-22645-8_27· OSTI ID:1984026

Garcia, David ^[1]; Das, Hrishikesh ^[1]; Sadayappan, Kumar ^[2]; Newcombe, Peter ^[3]; Herling, Darrell R. ^[1]; Grant, Glenn J. ^[1]; Komarasamy, Mageshwari ^[1]

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1. BATTELLE (PACIFIC NW LAB)
2. CANMET - Materials Technology Laboratory, Ottawa, Ontario, Canada
3. CANMET MATERIALS TECHNOLOGY LABORATORY

While rare-earth Mg alloys have remarkable properties for high strength applications, lower cost alternatives are necessary for the widespread industry use of Mg. Ca added Mg alloys have shown promise as an alternative to rare-earth alloys. Ca-based precipitates can reduce basal texture, reduce casting porosity, and increase mechanical strength. However, the accumulation of Ca-based precipitates along inter-dendritic regions can severely limit ductility. Here, we apply two solid phase processing techniques, friction stir processing and shear assisted processing and extrusion, to produce wrought microstructure sheet and extruded tubes from a cast Mg-Al-Mn-Ca alloy. Ductility of the alloy is enhanced by densification under applied force and elevated temperature, grain refinement, and refinement of (Al,Mg)-Ca based precipitate.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1984026
• Report Number(s): PNNL-SA-178509
• Country of Publication: Switzerland
• Language: English