| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
Directional Solidification Microstructure of Inconel 718 Manufactured by Electron Beam Additive Manufacturing |
| Author(s) |
Changwoo Lee, Byoung Soo Lee, Hyung Giun Kim, Gun Hee Kim |
| On-Site Speaker (Planned) |
Changwoo Lee |
| Abstract Scope |
Directional solidification microstructure (DSM) of Inconel 718, manufactured by electron beam (EB) additive manufacturing (AM) processing, was studied. DSM was controlled by focus offset current during the EB processing, and the properties of building product were evaluated in various processing conditions. Comparing to other recent reports about Inconel EM products, the building product has not only the highest level tensile strength about 1300 MPa at room temperature but also the highest level of elongation of about 25%. It is related to precipitation and grain direction. The precipitation size was increased with an increased focus offset current, and very good directional microstructure could be obtained in optimum focus offset condition. These DSM had an excellent effect on creep property, and the creep lifetime increased about 4 times comparing aged wrought product. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |