About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-64: Thermal Diffusivity and Flow Behavior of Metal Powder Beds Under Different Gas Environments |
| Author(s) |
Ummay Habiba, Farabi Hossain |
| On-Site Speaker (Planned) |
Farabi Hossain |
| Abstract Scope |
Thermal diffusivity measurements of metal powders commonly used in laser powder bed fusion (LPBF) additive manufacturing, including Inconel 718 (IN718), Ti-6Al-4V (Ti64), and 316L stainless steel (316L SS), were conducted over a range of temperatures under two different gaseous environments such as helium and nitrogen gases inside a controlled furnace. The results show that temperature has a relatively minor influence on powder-bed thermal diffusivity, whereas the surrounding gas environment plays a dominant role. For comparison, thermal diffusivity measurements were also performed on solid samples of the same materials. In addition, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) analyses were used to examine changes in powder morphology and surface oxidation resulting from elevated temperatures and different gas atmospheres. These findings highlight the importance of gas-environment selection in LPBF processes. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Additive Manufacturing, Powder Materials, Environmental Effects |