A newly developed ultrasonically assisted (UA) hot-wire wire arc additive manufacturing (HWAAM) process for TiB₂ nanoparticle reinforced AA7075 metal matrix nanocomposite (MMNC) was thoroughly studied. The synergic effects of UA and hot-wire system were discussed along with process parameters. HWAAM samples showed reduced porosities and improved deposition rate compared to conventional WAAM, while UA-HWAAM further upgraded the process and showed improvements in several aspects: reduced porosities, better dispersion of nanoparticles, and uniform microstructure, as reflected in the more homogeneous hardness distribution, and enhanced mechanical properties. Lower travel speed shows more significant UA improvements based on the longer UA-melt interaction time.

_{对新开发的用于 TiB 2}纳米粒子增强 AA7075 金属基纳米复合材料 (MMNC)的超声辅助 (UA) 热线电弧增材制造 (HWAAM) 工艺进行了深入研究。讨论了 UA 和热线系统的协同效应以及工艺参数。与传统 WAAM 相比，HWAAM 样品显示孔隙率降低和沉积速率提高，而 UA-HWAAM 进一步升级工艺并在几个方面表现出改进：孔隙率降低、纳米粒子分散更好和微观结构均匀，这反映在更均匀的硬度分布上，和增强的机械性能。基于较长的 UA-熔体交互时间，较低的行进速度显示出更显着的 UA 改进。