Microstructure and mechanical properties of novel Al-Mg-Mn-Zr-Sc-Er alloy

[Display omitted] •Er addition was found significant grain refinement from 290μm to 90μm.•Al3Er and not identify by XRD ternary (Al,Mg,Er) phases were formed.•High hardening effect in 30HV was obtained after annealing at 370°C for 4–10h.•YS=370MPa, UTS=470MPa at El.=9.5% were in the annealed after rolling state. Microstructure and mechanical properties of a novel Al-Mg-Mn-Zr-Sc-Er alloy with low Sc concentration were investigated. Significant grain refinements and the formation of Al3Er and ternary (Al,Mg,Er) phases were found by scanning electron microscopy and an X-ray analysis with Er addition. A high hardening effect in 30HV was obtained after annealing at 370°C for 4–10h. The maximum level of mechanical properties was found after rolling with a greater part of cold deformation. The research showed that YS=480MPa, UTS=524MPa at El.=4.2% after rolling, and YS=370MPa, UTS=470MPa at El.=9.5% after subsequent annealing at 200°C for 1h.