Ultrasonically assisted hot-wire arc additive manufacturing process of AA7075 metal matrix nanocomposite
Ultrasonically assisted hot-wire arc additive manufacturing process of AA7075 metal matrix nanocomposite
复制标题
超声辅助热丝电弧增材制造AA7075金属基纳米复合材料
DOI：
10.1016/j.jallcom.2022.168298
复制
发表时间：
2023
影响因子：
6.2
通讯作者：
Liu, Xun
中科院分区：
文献类型：
--
作者：
Wang, Tianzhao;Kang, Jiarui;Darnell, Mason;Liu, Xun
采用超声辅助热丝电弧增材制造技术制备了TiB 2纳米颗粒增强AA 7075金属基纳米复合材料。沿着工艺参数讨论了UA和热线系统的协同效应。与传统WAAM相比，HWAAM样品显示出降低的孔隙率和提高的沉积速率，而UA-HWAAM进一步升级了工艺，并在几个方面显示出改进：降低的孔隙率，更好的纳米颗粒分散性和均匀的微观结构，反映在更均匀的硬度分布和增强的机械性能。较低的行进速度显示基于较长UA-熔体相互作用时间的更显著的UA改善。
A newly developed ultrasonically assisted (UA) hot-wire wire arc additive manufacturing (HWAAM) process for TiB2nanoparticle 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.