About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing: Advanced Characterization with Synchrotron, Neutron, and In Situ Laboratory-scale Techniques
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Presentation Title |
In-line Powder Packing Density Analysis During Selective Laser Melting |
Author(s) |
Tan-Phuc Le, Karl Davidson, Bernard Gaskey, Po-Ju Chang, Matteo Seita |
On-Site Speaker (Planned) |
Tan-Phuc Le |
Abstract Scope |
The powder packing density in powder bed additive manufacturing (PBAM) is known to affect the quality and consistency of the consolidated parts. Investigating and monitoring variations in powder packing density in different PBAM processes is challenging owing to the small particle size and the large powder bed area. In this work, we use a “powder bed scanner” to capture high-resolution and large field of view images of the entire powder bed during the powder re-coating process. We quantify powder particle density via numerical analysis of the acquired images and analyze it as a function of powder layer thickness, re-coating speed, re-coater blade type, and powder particle size distribution. Our preliminary results show that the particle density may vary up to 20% from start to end of an individual powder spread. We use this information to study the effect of powder packing density on site-specific mechanical properties in PBAM-produced parts. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |