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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Scandium Extraction and Use in Aluminum Alloys
Presentation Title Influence of the Al3(Sc,Zr) Dispersoids and the Stretching on the Natural Ageing Behavior of a Binary Al-4wt%Cu Alloys
Author(s) Baptiste Rouxel, Thomas Dorin
On-Site Speaker (Planned) Baptiste Rouxel
Abstract Scope Aluminium alloys are extensively used in the aerospace industry due to their high specific strength. Combined Scandium and Zirconium additions result in the formation of nanometer-size Al3(Sc,Zr) dispersoids which considerably increase the mechanical properties of these alloys. Recent research on Al-Cu-Sc-Zr model alloys showed that these dispersoids accelerate the formation kinetics of the copper rich precipitates and modify their precipitation sequence. This behaviour was then further investigated on industrial 2xxx series alloys with different amount of Zr and Sc addition. The precipitation kinetics was investigated with hardness and tensile measurements. TEM and DSC were used to characterise the precipitates formed. The strength increment during natural ageing was found to be higher in Sc and Zr containing and pre-stretched alloys as compared to the Sc free alloys. The results suggest that could be due to the formation of metastable θ-like phase at the detriment of the most common GP zone phases.
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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