Nucleation and Precipitation Strengthening in Dilute Al-Ti and Al-Zr Alloys

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Coarsening- and creep resistance of precipitation-strengthened Al–Mg–Zr alloys processed by selective laser melting (2020, background): “The L12-Al3Zr nanoprecipitates within the grain are grouped in dendritic regions, as evidenced in the inset of Figure 6(b)), consistent with the peritectic solidification of dilute Al-Zr alloy causing Zr segregation in Zr-rich dendritic arms and Zr-poor interdendritic regions [38].”
Microstructure and mechanical properties of a precipitation-strengthened Al-Zr-Sc-Er-Si alloy with a very small Sc content (2018, unknown): “Alternatively, due to Zr's small diffusivity in Al, the Zr-rich alloys need excessively long aging times before achieving a peak microhardness [10,11,18,22,23], generally more than 100 h at 400 C for a similar concentration of solute used in this study.”