About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Mechanisms of Pore Elimination During 3D Printing of Metals |
Author(s) |
Seyed Mohammad Hassan Hojjatzadeh, Niranjan D. Parab, Wentao Yan, Qilin Guo, Lianghua Xiong, Cang Zhao, Luis I. Escano, Minglei Qu, Xianghui Xiao, Kamel Fezzaa, Wes Everhart, Tao Sun, Lianyi Chen |
On-Site Speaker (Planned) |
Seyed Mohammad Hassan Hojjatzadeh |
Abstract Scope |
Laser powder bed fusion (LPBF) is a 3D printing technology that can print metal parts with complex geometries without the design constraints of traditional manufacturing routes. However, the parts printed by LPBF normally contain many more pores than those made by conventional methods, which severely deteriorates their properties. Here, by combining in-situ high-speed high-resolution synchrotron x-ray imaging experiments and multi-physics modeling, we unveil the dynamics and mechanisms of pore motion and elimination in the LPBF process. We discovered a new mechanism based on thermocapillary force that can rapidly eliminate pores from the melt pool during the LPBF process. The pore elimination mechanisms reported here may inspire and guide the design of 3D printing approaches to achieve pore-free 3D printing of metals. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |