The study on the coarsening process and precipitation strengthening of Al3Er precipitate in Al–Er binary alloy.

Highlights: [•] The critical radius of Al3Er from coherent to semi-coherent was 8.0–9.1nm. [•] The diffusion activation energy of Er in Al was evaluated to be 77.2±5.3kJ/mol. [•] The misfit of Al3Er with matrix would be reduced at small particle range. [•] The APB energy of Al3Er was estimated to be about 0.60±0.03J/m2. [ABSTRACT FROM AUTHOR]