About this Abstract |
Meeting |
Materials Science & Technology 2020
|
Symposium
|
Additive Manufacturing: Materials, Alloy Development, Microstructure and Properties
|
Presentation Title |
Structural Characterization of Wire and Arc Additive Manufactured (WAAM) Austenitic Stainless Steel |
Author(s) |
Sudhakar Vadiraja, Ryan Foley |
On-Site Speaker (Planned) |
Sudhakar Vadiraja |
Abstract Scope |
This research focuses on the microstructural characterization of 308L stainless steel samples produced by a novel WAAM technique known as Plasma Arc Weld Print 3D (PP3D). PP3D consists of multiple plasma arc torches that can deposit material in two modes of deposition: a more conventional “continuous” deposition mode and a “dabber” deposition mode that produces relatively small and overlapping weld beads. Microstructural characterization of the specimens produced by these two modes was carried out by Leica DM750P optical microscopy. Dabber mode sub-grain microstructural features were significantly finer in size while being highly variable in terms of orientation and morphology. This is in contrast to coarser and more consistently oriented microstructural features of the continuous mode samples. At the macro-level, features of the dabber mode were observed to be consistently coarser with many columnar grain features when compared to the continuous deposition mode. |