The effect of multi-pass multi-directional forging (MDF) on the microstructure and mechanical properties of Zn–22Al–xSi (X = 4 and 8 wt. %) alloy, also known as Si_P/ZA22 composite, was investigated. MDF process was applied at 100 °C for one, three, and five passes with the strain of 0.47 per pass. According to the results, MDF refined and homogenized the composites microstructure so that the average size of primary Si (Si_P) particles reduced from 25.0 µm and 30.4 µm in as-cast ZA22-4Si and ZA22-8Si composites to about 6.2 µm and 7.3 µm in five-pass MDFed condition, respectively, and their distribution shifted to the smaller size range. Mechanical properties tests revealed that multi-pass MDF has softened the investigated composite. For instance, the hardness, tensile strength, and shear strength of ZA22-4Si composite reduced from 83 HV, 280 MPa, and 165 MPa in as-cast condition to about 58 HV, 160 MPa, and 118 MPa in the five-pass MDFed sample, respectively. This is while its fracture strain increased from 15% to about 40% with the strain rate of 1.2 × 10^–3 s⁻¹.

研究了多道次多方向锻造（MDF）对Zn–22Al–xSi（X  = 4和8 wt。％）合金（也称为Si _P / ZA22复合材料）的组织和力学性能的影响。MDF工艺在100°C下进行一，三和五遍，每遍的应变为0.47。根据结果​​，MDF细化并均匀化了复合材料的微观结构，从而使原始Si（Si _P）颗粒从铸态ZA22-4Si和ZA22-8Si复合材料中的25.0 µm和30.4 µm减少到五遍MDF处理条件下的约6.2 µm和7.3 µm，并且它们的分布向较小的尺寸范围移动。力学性能测试表明，多道次MDF已软化了所研究的复合材料。例如，ZA22-4Si复合材料的硬度，拉伸强度和剪切强度从铸态条件下的83 HV，280 MPa和165 MPa降低到五道次MDF加工后的58 HV，160 MPa和118 MPa。样本。此时，其断裂应变从15％增加到约40％，应变率为1.2×10 ^–3  s ^-1。