About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing for Energy Applications V
|
Presentation Title |
Sintering Process Optimization for FeCrAl Alloys in Metal Extrusion Additive Manufacturing |
Author(s) |
Amrita Lall, Saumyadeep Jana, Zachary Kennedy, Michelle Fenn |
On-Site Speaker (Planned) |
Amrita Lall |
Abstract Scope |
Iron-chromium-aluminum (FeCrAl) alloys are heat-resistant ferritic stainless-steels used in several high-temperature applications because of their high-temperature strength and form-stability. It forms a highly protective aluminum oxide layer, which provides high corrosion and oxidation-resistance. Metal extrusion additive manufacturing (MEAM) of FeCrAl alloy allows efficient manufacturing of complex designs. In this study, gas-atomized FeCrAl powder, consisting of 19-23.5% Cr, 4.5-5.5% Al, by wt.%, was used to produce FeCrAl/polymeric-binder composite pellets by adding binders and sintering them by varying hold time, ramp rate, temperature, and environment. Dilatometer tests and furnace sintering trials were conducted at temperatures upto 1400C, by adding isothermal holds at various temperatures for upto 24 hours in various environments. Optimization of sintering parameters resulted in thermal-debinding without delamination of adjoining layers and attainment of 99% density by volume. The analysis of resulting microstructure using optical and SEM/EBSD imaging revealed that the strengthening nano-sized oxide particle in the matrix are preserved. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Temperature Materials, Iron and Steel |