|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location Specific, Processing-Microstructure-Property-Relationships III
||Fabrication of Large Additively Manufactured Stainless Steel Structures Using Directed Energy Deposition
||Zakariya Khayat, Todd Palmer
|On-Site Speaker (Planned)
The directed energy deposition (DED) Additive Manufacturing (AM) process can be scaled to produce large structures with build volumes far in excess of those commonly encountered with powder bed fusion. When scaling to large structures, the need to increase deposition rates, suitable powder feedstock supplies, and start/restart procedures, need to be addressed. A series of 304L and 316L stainless steel structures have been fabricated using DED AM techniques. Mechanical and microstructural characterization of test specimens in the as-deposited and hot isostatically pressed (HIP) conditions for gas atomized powder feedstock showed suitable properties and microstructures. Additionally, the performance of water atomized 316L powders were also examined and the need for tight control of the powder chemistry for controlling solidification structures has been defined. Challenges encountered in the design and fabrication of the near net shape component are reviewed.
||Planned: Supplemental Proceedings volume