Decreasing the mechanical anisotropy of the forged Mg-8.5Gd-2.5Y-1.5Zn-0.5Zr alloy by modulating blocky LPSO particles using multi-directional forging

The blocky LPSO particles were modulated by single-directional and multi-directional forging, and the effect of blocky LPSO particles on the anisotropy of mechanical properties of Mg-8.5Gd-2.5Y-1.5Zn-0.5Zr alloy forged parts was investigated. In the present work, 3D processing maps are established, and the forming domain that is both stable and power efficient is in the temperature range from 430 to 500 ℃ and strain rate range from 0.001 to 0.06 s ⁻¹, which is used to guide the single-directional forging (SDF) and multi-directional forging (MDF) experiments. The tensile mechanical properties reveal that the blocky LPSO particles have an influence on the mechanical anisotropy, especially in terms of the elongation anisotropy. The blocky LPSO particles after the MDF process have a more regular shape and smaller size and are homogeneously distributed, which is responsible for the low anisotropy of the elongation. In addition, the age-hardening capability of the MDF part is higher than that of the SDF part.