About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Controlling Grain Evolution of IN625 Parts Produced by LPBF-AM |
Author(s) |
Edward Palmer, Jordan Rosser, Steve Brown, Nicholas Lavery, Matthew Ritchie |
On-Site Speaker (Planned) |
Matthew Ritchie |
Abstract Scope |
Laser Powder Bed Fusion (LPBF) Additive Manufacturing (AM) is rapidly being adopted globally due to its capability of producing complex net-shape parts in a range of alloys with mechanical properties as good as, or better than conventional processes.
The alluring possibility is in controlling microstructural features during processing such as grain size, solidification morphology and texture, giving mechanical properties tailored for intended applications.
LPBF-AM microstructures are dominated by sizable columnar growth, which along with even small levels porosity contribute to lower fatigue and creep strength in comparison to wrought. This would limit high temperature applications where IN625 is used in aeroengine exhaust sections. In contrast, the less dominating equiaxed grains lead to a reduction in crack propagation and improve fatigue performance at the surface.
In this work a combination of physical experiments and modelling is used to study the controllability of grain growth and orientation of IN625 made by LPBF-AM. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |