|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Nano/Micro-mechanics and Length-scale Phenomena
||J-44: Probing the Mechanism of Healing Micropores in Additive Manufacturing Al-Li Alloys Using High Resolution X-ray Computed Tomography
||Junsheng Wang, Chenpeng Xue
|On-Site Speaker (Planned)
Porosity is one of the major obstacles for wide application of wired arc additive manufacturing of Al-Li alloys because it reduces the fatigue life and static properties significantly. Here we found the long chains of porosity along the melt pool can be healed by external forces but the healing cannot be achieved if local strain and pore size was not correlated. Using high resolution X-ray Computed Tomography, we probe the mechanism of this healing process and uncover the effects of porosity and nano precipitates on the mechanical strength, enabling subsequent process optimization for high performance AM components.
||Additive Manufacturing, Aluminum, Characterization