Abstract
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.
Original language | English |
---|---|
Article number | 168298 |
Journal | Journal of Alloys and Compounds |
Volume | 936 |
DOIs | |
State | Published - Mar 5 2023 |
Funding
This work was supported by National Science Foundation , United States, CMMI AM Award # 2044526 : CAREER: Ultrasonically Assisted Wire Arc Additive Manufacturing of Metal Matrix Nanocomposites for High-strength, Lightweight Structures. Electron microscopy was performed at the Center for Electron Microscopy and Analysis (CEMAS) at The Ohio State University.
Keywords
- Hot-wire GTAW
- Metal matrix nanocomposite
- Power ultrasound
- Wire arc additive manufacturing