| About this Abstract |
| Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Symposium
|
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
| Presentation Title |
Experimental Study of Cryogenic Directed Energy Deposition Conducted at -20°C |
| Author(s) |
Wei Li, Kishore Mysore Nagaraja, Benquan Li |
| On-Site Speaker (Planned) |
Wei Li |
| Abstract Scope |
Ambient temperature has a great influence on directed energy deposition (DED), such as temperature gradient, cooling rate, and grain evolution. Currently, the DED is only performed under laboratory conditions (20°C to 25°C). So far, the DED has not been explored specifically under low temperature or cryogenic conditions. This experimental study fills this gap. In this work, the ambient temperature of DED (including substrate) was chilled to -20°C. The authors printed three thin-wall samples with stainless steel 316L powder at this cold condition. As comparative test, another sample with same geometry and material was printed with same DED parameters at room temperature (20°C). The results show some interesting findings. The sample height and molten pool size (-20°C) are larger than the sample printed at 20°C. Additionally, the hardness values of samples printed at -20°C are greater than those printed at room temperature. The tensile tests showed the -20°C samples had better mechanical properties. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |