A considerable part of the available literature on scandium in aluminium alloys is reviewed. Experimental data and assessments of the binary Al–Sc phase diagram, a wide range of ternary Al–Sc–X phase diagrams and a few higher order phase diagrams are accounted for, with emphasis on the aluminium rich part of the diagrams. The phase which is in equilibrium with Al, Al3Sc, can form by several different mechanisms, all of which are described. The precipitation kinetics of Al3Sc in binary Al–Sc alloys are discussed, and an overview of the reported influences of ternary alloying elements on the precipitation of Al3Sc is given. The Al3Sc phase particles can serve as a grain refiner in the Al melt, a dispersoid for controlling the grain structure of the alloy and a strengthening precipitate. Several examples of these three effects are mentioned, both in binary Al–Sc alloys, and in more complex alloys. The reported effects of Sc on the precipitation behaviour in Al–Cu, Al–Mg–Si, Al–Zn–Mg and Al–Li alloys ...

http://www.arc.nucapt.northwestern.edu/refbase/files/Royset-2005.pdf

Scandium in aluminium alloys

http://www.arc.nucapt.northwestern.edu/refbase/files/Marquis-Nanoscale.pdf

Nanoscale structural evolution of Al3Sc precipitates in Al(Sc) alloys

http://nucapt.northwestern.edu/refbase/files/Knipling-2009_10705.pdf

Precipitation evolution in Al–0.1Sc, Al–0.1Zr and Al–0.1Sc–0.1Zr (at.%) alloys during isochronal aging

http://arc.nucapt.northwestern.edu/refbase/files/fuller-alsczrmech.pdf

Mechanical properties of Al(Sc,Zr) alloys at ambient and elevated temperatures

http://nucapt.northwestern.edu/refbase/files/Booth-Morrison-2011_11265.pdf

Coarsening resistance at 400 °C of precipitation-strengthened Al–Zr–Sc–Er alloys

This is the first book to generalize and analyze the extensive experimental and theoretical results on the phase composition, structure, and properties of aluminum alloys containing scandium. The effects of scandium on these properties are studied from a physico- chemical viewpoint. The authors present binary, ternary, and more complex phase diagrams for these alloys and consider in detail recrystallization, superplastic behavior, and decomposition of supersaturated solid solutions and the effects of solidification conditions on phase equilibria.

T V Dobatkina

Papers

Advanced Aluminum Alloys Containing Scandium: Structure and Properties