About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Powder Materials Processing and Fundamental Understanding
|
Presentation Title |
Characterising the Vapour Plume and Preferential Vaporisation of Alloy Elements during Laser Powder Bed Fusion Additive Manufacturing |
Author(s) |
Anna C.M. Getley, Samy Hocine, Elena Ruckh, Rubén Lambert-Garcia, Sebastian Marussi, Peter D Lee, Mike Towrie, Chu Lun Alex Leung |
On-Site Speaker (Planned) |
Anna C.M. Getley |
Abstract Scope |
Additive Manufacturing (AM) is regarded as the next revolution in the manufacturing sector. Laser Powder Bed Fusion (LPBF), a subset of AM, enables the design freedom to create progressively complex metal components; during the process, a bed of alloy powder is fused into solid via layer-wise melting with a high-power laser. A critical limitation influencing LPBF is preferential vaporisation; a phenomenon describing the unequal loss of alloy elements from the laser-matter interaction zone, due to differing physical properties. Preferential vaporisation has been sparingly observed in AM-printed parts through destructive techniques. This study presents the first demonstration of in situ synchrotron radiography and chemical characterisation techniques to analyse surface composition changes in a non-destructive fashion. We apply these experimental methods to link keyhole dimensions with surface chemistry, and further report a process map of preferential vaporisation across an AM track, as a function of LPBF parameters, over multiple industrial alloys. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Other, Characterization |