About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing of Metals: Applications of Solidification Fundamentals
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Presentation Title |
Grain Boundary Character Distribution in Additively Manufactured Nickel-based Superalloy INC738 |
Author(s) |
Ming Luo, Xiaozhou Liao, Simon P Ringer, Sophie Primig, Nima Haghdadi |
On-Site Speaker (Planned) |
Ming Luo |
Abstract Scope |
Additive manufacturing (AM) has attracted considerable attention in recent years owing to its unique benefits such as design freedom. Grain boundary engineering (GBE) is a strategy to control the grain boundary network of materials to improve mechanical properties and reduce undesirable intergranular phenomena. The traditional GBE processes, usually composed of thermomechanical treatments, cannot be applied in AM because the builds are usually printed to shape, and therefore cannot be deformed after printing. However, AM instead unlocks a new opportunity to activate GBE, i.e., in-situ GBE, where AM inherent thermal signatures and stresses may trigger GBE. Optimized AM processing parameters that activate in-situ GBE and how the engineered grain boundary network affects mechanical and corrosion properties remain currently unknown for most alloys. To fill this knowledge gap, this study unveils the effect of the scanning strategy on the grain boundary network evolution in electron powder bed fusion printed Ni-based superalloy INC738. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Copper / Nickel / Cobalt, Other |