| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Process-induced Microstructures and Defects
|
| Presentation Title |
F-58: Thermally-Stable Invar-Cu Intrinsic Composites Formed by Laser Powder Bed Fusion |
| Author(s) |
Haobo Wang, Prosenjit Biswas, Ji Ma, Jerrold Floro |
| On-Site Speaker (Planned) |
Haobo Wang |
| Abstract Scope |
This research focuses on developing additive manufacturing approaches to print Invar-Cu alloys as tailored composites, using laser powder bed fusion (LPBF). The objective is to obtain an appropriate composite microstructure that simultaneously integrates low thermal expansion from Invar and good thermal conductivity from Cu by manipulating LPBF parameters. The ideal outcome is an aligned Invar cellular matrix with a percolating intercellular Cu network functioning as a thermal-conduction shortcut throughout the build volume. Initial single-track experiments revealed the effect of defocused beam on cell alignment and length scales. Subsequently, bulk Invar-Cu parts were printed by LPBF, and microstructures and compositions of printed parts were examined throughout transverse and longitudinal cross-sections. We will discuss microstructures and resultant thermal properties of printed parts, as characterized by time-domain thermoreflectance, laser flash, and dilatometry. The properties of arc-melted samples and LPBF parts will be contrasted and discussed. Support by the II-VI Foundation is gratefully appreciated. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Solidification, Composites |