| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
A-98: Effect of Semi-solid Treatment on Microstructure and Mechanical Properties Additive Manufactured Inconel 625 |
| Author(s) |
Lukasz Rogal, Damian Kalita, Karol Janusz, Jan Dutkiewicz, Marek Węglowski, Tomasz Durejko, Anna Antolak-Dudka |
| On-Site Speaker (Planned) |
Lukasz Rogal |
| Abstract Scope |
Two various methods of rapid manufacturing, Electron Beam Additive Manufacturing (EBAM) and Laser Engineered Net Shaping (LENS), were used in order to fabricate 625 Inconel elements. To improve its properties, a semi-solid treatment has been developed. It consisted of rapid quenching from the mushy zone, corresponding to 20-60% of the liquid fraction, to obtain a supersaturated solid solution by alloying elements. The DSC allowed to determine the semi-solid range of elements after 3D printing from wire and powder. Next, the samples were heated up to 1345°C and 1380°C, which corresponds to 50 % of the liquid fraction, held for 15 min, and next water quenched. The LENS treated sample exhibited γ-dendritic cells with short secondary arms and interdendritic areas enriched in the alloying elements. In the samples obtained by the EBAM proces, the microstructure consisted of coarse γ-re-melted dendrites (which started to spheroidise) between which a rapidly quenched secondary phase was present in the volume of 45%, enriched in the intermetallic phases (carbides, Laves phase). Additionally, aging at 650˚C revealed significant increases in hardness for the samples obtained by the EBAM process.
Acknowledgment: The research was supported by the project No 2016/23/B/ST8/00754 |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |