In the field of magnesium matrix composites (MMCs), it is vital to improve the strength of MMCs without sacrificing plasticity. In this work, Ti_P/VW94 composites with different Ti particle sizes were prepared by semi-solid stirring assisted ultrasonic vibration method and then subjected to homogenizing treatment. The microstructure results show that the Ti particles are conducive to forming the RE-rich phase. The Mn atoms diffused to the edge of Ti particles, and a submicron layer of MnTi formed at Mg/Ti interface. The atomic spacing misfit at the Mg/MnTi interface is 2.8%, indicating that a strong interfacial bonding was formed at the Mg/Ti interface. The tensile test results show that the strength and elongation all improved after adding Ti particles and improved first and then declined with the decrease of fine Ti particles and the increase of coarse Ti particles. The YS of D3 sample with 2.5% fine Ti particles and 1% coarse Ti particles increased by 12%, the UTS increased by 21%, and the elongation increased by 48% compared with the VW94 matrix alloy.

在镁基复合材料 (MMC) 领域，在不牺牲塑性的情况下提高 MMC 的强度至关重要。在这项工作中，Ti _P采用半固态搅拌辅助超声振动法制备不同Ti粒径的/VW94复合材料，然后进行均质化处理。显微组织结果表明，Ti颗粒有利于形成富RE相。Mn原子扩散到Ti颗粒的边缘，在Mg/Ti界面形成一层亚微米的MnTi层。Mg/MnTi 界面处的原子间距失配率为 2.8%，表明在 Mg/Ti 界面处形成了强界面键合。拉伸试验结果表明，加入Ti颗粒后强度和伸长率都有所提高，并且随着细Ti颗粒的减少和粗Ti颗粒的增加，强度和伸长率均呈现先提高后下降的趋势。含 2.5% 细 Ti 颗粒和 1% 粗 Ti 颗粒的 D3 样品的 YS 增加了 12%，UTS 增加了 21%，