#6689. Microstructures and mechanical properties of Mg-6Gd-1Er-0.5Zr alloy sheets produced with different rolling temperatures

November 2026publication date
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Journal’s subject area:
Mechanical Engineering;
Metals and Alloys;
Mechanics of Materials;
Materials Chemistry;
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Abstract:
In this study, we investigated the microstructures and mechanical properties of Mg-6Gd-1Er-0.5Zr (GE61K) sheets. The results show that the rolling temperature has a remarkable influence on microstructures, age-hardening responses and mechanical properties of GE61K sheets. The microstructures varies with the increase in rolling temperatures, i.e. microstructures were dominated by the mixture of dynamic recrystallized (DRXed) grains and un-DRXed grains at 300 °C, by DRXed grains at 350 °C, and by un-DRXed grains at 400 °C and 450 °C. Rolling at 300 °C leads to a formation of the bimodal microstructure which contains equilibrium Mg5(Gd, Er) precipitates and a large number of dislocations.
Keywords:
Age-hardening response; Mechanical properties; Mg-Gd-Er-Zr sheets; Precipitate chain

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