About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Materials Design and Alloy Development V – Design Fundamentals
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Presentation Title |
A-56: Synchrotron X-ray Imaging of the Effect of TiB2 Additions on Laser Powder Bed Fusion (LPBF) of Al-2139 |
Author(s) |
David T. Rees, Chu Lun Alex Leung, Joe Elambasseril, Sebastian Marussi, Saurabh Shah, Shashidhara Marathe, Milan Brandt, Mark Easton, Peter D. Lee |
On-Site Speaker (Planned) |
David T. Rees |
Abstract Scope |
Laser powder bed fusion (LBPF) of Al 2XXX series alloys is ideally suited for producing low volume specialist aerospace components. However, a high susceptibility to hot cracking reduces the mechanical performance and fatigue resistance of these parts due to the presence of cracks introduced during fabrication. We investigated two strategies to suppress the formation of hot cracks by controlling solidification behavior: 1) TiB2 inoculant additions; and 2) optimization of LPBF process parameters. Using high-speed synchrotron X-ray imaging, we monitored the LPBF of Al-2139 with and without the addition of TiB2 for a range of parameters. To quantify the resultant defect population, we also performed post-build synchrotron computed tomography. Our results show 3D quantification of defect morphology and the volume fraction of defects, revealing that inoculant addition give a reduction in crack volume of up to 79%, as well as reducing the average length, breadth and surface area of cracks. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Solidification |