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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Scandium Extraction and Use in Aluminum Alloys
Presentation Title Novel Heat Treatments for Scandium Containing Al-Si Alloys (Including 6xxx Series Alloys)
Author(s) Timothy James Langan, Mahendra Ramajayam , Thomas Dorin
On-Site Speaker (Planned) Timothy James Langan
Abstract Scope Benefits of alloying Sc with aluminum resulting from the precipitation of coherent Al3Sc dispersoids, including refined microstructure and increased strength, have been demonstrated for the 1xxx, 3xxx, 5xxxx and 7xxx alloy systems. Historically interactions between Sc and Si have limited the benefits of Sc additions in Al-Mg-Si 6xxx alloys. This work characterizes microstructures of as cast model alloys to elucidate interactions between Sc and Si. The Si content in the model alloys was selected to represent levels used in commercial 6xxx alloys (0.2 to 1.5wt%). Phases and compositional distributions were evaluated using various techniques including Atom Probe Tomography (APT). Hardness and conductivity were also used to assess changes in the microstructure. Novel approaches that optimize the precipitation of fine coherent Sc-containing dispersoids were developed. The structure and composition of these dispersoids, which will be used to strengthen and control grain structure in Al-Si-Mg (Cu) alloys, will be discussed.
Proceedings Inclusion? Planned: Light Metals

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

An Examination of the Effect of Solidification Processing upon the Strengthening of AlMgSc Alloys
Commercial Scandium Oxide Production by Sumitomo Metal Mining Co., Ltd.
Design and Processing Conditions of Hypoeutectic Al-Cu-Sc Alloys for Maximum Benefit of Scandium
Direct Method for Producing Scandium Metal and Scandium-aluminium Intermetallic Compounds from the Oxides
Effect of Treatment Parameters on Structure, Mechanical and Corrosion Properties of Al-Mg-Sc Alloy Forgings with Reduced Concentration of Scandium
Electrochemical Formation of Alloys of Scandium in Molten Salts
Experimental Study on Extracting Scandium from Silicate Containing Rare Earth Minerals with Scandium by Magnetic Separation
Extraction of Scandium from Lateritic Nickel-cobalt Ore Leach Solution by Ion Exchange: A Special Study and Literature Review on Previous Works
Influence of the Al3(Sc,Zr) Dispersoids and the Stretching on the Natural Ageing Behavior of a Binary Al-4wt%Cu Alloys
Mechanical Properties and Applications of Aluminum Scandium Alloys at Elevated Temperatures
Novel Heat Treatments for Scandium Containing Al-Si Alloys (Including 6xxx Series Alloys)
Sc Applications in Aluminum Alloys: Overview of Russian Research in the 20th Century
Scandium-enriched Nano-precipitates in Aluminum Provide Enhanced Coarsening and Creep Resistance
Scandium Recovery from the Nyngan Laterite Project in NSW
The Effect of Scandium and Zirconium on the Microstructure, Mechanical Properties and Formability of a Model Al-Cu Alloy
The Effect of Scandium on the Electrical Conductivity and Mechanical Properties of Al-Sc Alloys

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