| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Process-induced Microstructures and Defects
|
| Presentation Title |
Evaluation of Porosity in Aluminum Deposits |
| Author(s) |
Nick Gandara, Michael Strohmeyer, Bernard Gaskey, Justin Cross |
| On-Site Speaker (Planned) |
Nick Gandara |
| Abstract Scope |
During metal deposition in either welding or additive manufacturing processes, porosity in the newly solidified material is often the dominant form of defect. There are many possible sources of porosity in various processing regimes including gas entrapment and segregation, and other atmospheric or shielding gas interactions. Each mechanism forms characteristic sizes, shapes, and spatial distributions of voids which can entrap different gases. Carefully characterizing porosity can greatly speed the development of new techniques by providing vital information about the behavior of the melt pool. Here, we evaluate retained porosity in multipass gas metal arc welds (GMAW) in aluminum. Using data gathered from initial experiments, we are able to rapidly evolve the welding parameters to achieve higher density and consequently improved mechanical performance. We demonstrate that an understanding of defect characteristics can significantly streamline the development process of wire-based additive manufacturing strategies. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Aluminum, Joining, Solidification |