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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Scandium Extraction and Use in Aluminum Alloys
Presentation Title The Effect of Scandium and Zirconium on the Microstructure, Mechanical Properties and Formability of a Model Al-Cu Alloy
Author(s) Thomas Dorin, Mahendra Ramajayam, Timothy Langan
On-Site Speaker (Planned) Thomas Dorin
Abstract Scope The addition of zirconium together with scandium is known to increase the strength of Al alloys. However, the impact of Sc on extruded age-hardenable Al-Cu alloys is currently unknown. This work explores the impact of Sc and Zr on the formability, microstructure and mechanical properties of an extruded Al-4wt%Cu alloy. The addition of 0.1wt%Sc and 0.2wt%Zr is found to increase the yield strength by 150 MPa at room temperature with limited effect on the extrudability. The flow stress behavior is evaluated as a function of temperature and strain rate. The microstructure is investigated with electron backscattered diffraction, transmission electron microscopy and atom probe tomography. The Al3(Sc,Zr) dispersoids are found to act as preferential nucleation sites for the θ’ precipitates and this accounts for most of the observed strength increase. The enhanced hot formability is related to the strong anti-recrystallization effect of Sc in Al.
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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