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)
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Presentation Title |
Direct Observation of Pore Formation Mechanisms During LPBF Additive Manufacturing Process |
Author(s) |
Seyed Mohammad Hassan Hojjatzadeh, Niranjan D. Parab, Qilin Guo, Minglei , Lianghua Xiong, Cang Zhao, Luis I. Escano, Kamel Fezzaa, Wes Everhart, Tao , 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 parts with complex geometries that are unachievable by conventional manufacturing technologies. However, pore formation during metal LPBF process can deteriorate the mechanical performance of the printed parts. In this research, we study pore formation mechanisms during continuous wave (CW) LPBF and pulsed wave (PW) LPBF processes by using in-situ high-speed synchrotron x-ray imaging technique in real time. We report six pore formation mechanisms during the CW-LPBF process and one main pore formation mechanism during PW-LPBF process. In addition, we demonstrated the mechanism of cavity pattern and pore pattern formation during pulsed-wave laser melting. The results presented here provide direct evidence and insight into pore formation mechanisms during the LPBF process, which may guide the development of pore elimination/mitigation approaches during 3D printing of metals. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |