|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Beyond the Beam III
||Interface formation during metal 3D printing: from individual droplets to 3D parts
||Negar Gilani, Nesma Aboulkhair, Marco Simonelli, Ian Ashcroft , Richard Hague
|On-Site Speaker (Planned)
Drop-on-demand metal jetting is a new exciting fabrication technique for single and multi-metal components at high resolutions that avoids the use of powders or complicated post-processing. However, the full exploitation of this technology is impeded by a lack of understanding of droplets’ morphology after deposition and solidification, the interface formed by such droplets, and microstructure, all of which define the consistency and quality of printed parts. Here, characteristics of micro-droplets deposited through MetalJet were investigated using FIB-SEM, EBSD, and TEM. In parallel, numerical modelling provided insights into phenomena not directly accessible via experimental such as temperature evolution. The research shows that the substrate wetting and thermal properties are influential in setting the morphology of droplets since they define the droplets dynamics and solidification rate, respectively. Furthermore, the bonding mechanism varies depending on the droplet and substrate materials, while the consistency of interfaces is controlled via process parameters such as temperature.
||Additive Manufacturing, Characterization, Solidification