|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Titanium Technology
||Microstructure in the Selective Laser Melted Ti-48Al-2Cr-2Nb Alloy
||Dian Li, Wenrui Zhao, Xing Zhang, Yiliang Liao, Yufeng Zheng
|On-Site Speaker (Planned)
Additive manufacturing opens new avenues for manufacturing the near-net-shape TiAl components with complex geometries, which serve as a promising structural material for aerospace applications. Our recent study indicated that decorating the additive manufacturing powders with graphene oxide sheets can help solve the cracking issue associated with select laser melting of Ti-48Al-2Cr-2Nb (at.%, Ti-4822). In this presentation, we will introduce our 3D characterization using FIB-SEM tomography to study the microstructural evolution and the defect formation during select laser melting of Ti-4822 and graphene oxide added Ti-4822. We observed micro-scale cracks and sub-micron pores in different morphologies in the as-printed Ti-4822 but only nano-scale pores with dramatically reduced size and number density in the graphene oxide added Ti-4822. The experimental data collected from 3D FIB-SEM tomography revealed that graphene oxide can improve the manufacturability of Ti-4822.
||Additive Manufacturing, Titanium, Characterization