Abstract Zn-Mg alloy was isothermally annealed in the semi-solid range under a high magnetic field (HMF). Results showed that, regardless of the HMF, the specimens exhibit inhomogeneous structures, i.e., primary Zn-rich dendrites and granular (nearly spherical or platelike in three dimensions) particles are distributed in the upper and lower parts, respectively. Applying the HMF and decreasing the annealing temperature significantly contribute to the structural homogeneity, which are ascribed to the induced magnetic viscosity resistance force and the higher viscosity of the interdendritic liquid, respectively. Moreover, the HMF aligns the primary dendrites and platelike particles with their longer axes parallel to the HMF direction B. In addition, the HMF preferentially orients all the granular particles with their c-axis perpendicular to B, regardless of their sizes and shapes. The regular alignment and preferential orientation are related to the magnetocrystalline anisotropy of the primary Zn-rich crystals.

中文翻译：

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半固态等温退火过程中强磁场对Zn-Mg合金宏观和微观结构的影响

摘要 Zn-Mg 合金在高磁场（HMF）下在半固态范围内等温退火。结果表明，无论HMF如何，样品均表现出不均匀的结构，即初级富锌枝晶和粒状（三维近球形或板状）颗粒分别分布在上部和下部。应用 HMF 和降低退火温度显着有助于结构均匀性，这分别归因于感应磁粘性阻力和枝晶间液体的较高粘度。此外，HMF 将初级枝晶和板状颗粒排列成平行于 HMF 方向 B 的长轴。此外，HMF 优先定向所有颗粒颗粒，使其 c 轴垂直于 B，无论它们的大小和形状如何。规则排列和优先取向与原生富锌晶体的磁晶各向异性有关。