|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advances in Additive Manufacturing of Titanium and Titanium Based Alloys
||The Effects of Electrically-assisted Ultrasonic Nanocrystal Surface Modification on 3D-printed Ti-6Al-4V Alloy
||Hao Zhang, Jingyi Zhao, Haifeng Qin, Zhencheng Ren, Gary L Doll, Yalin Dong, Chang Ye
|On-Site Speaker (Planned)
3D-printed Ti-6Al-4V components have great potential in the aerospace and biomedical industries. However, its wide application is limited by some inherent disadvantages, such as poor surface finish and high porosity. In this study, an innovative method, electrically-assisted ultrasonic nanocrystal surface modification (EA-UNSM) was introduced to process 3D-printed Ti-6Al-4V specimens. The effect of EA-UNSM on surface finish, microstructure, porosity and in-depth hardness was investigated. Compared with the conventional UNSM process, smoother surfaces and lower subsurface porosity were obtained after EA-UNSM. EA-UNSM also led to a thicker plastically-affected depth compared with conventional UNSM. Numerical modelling showed that localized heating exists near the pores in 3D-printed Ti-6Al-4V subjected to EA-UNSM. This localized heating could potentially facilitate the pore compression effect under ultrasonic striking.
||Planned: Supplemental Proceedings volume