Crack Control in Additive Manufacturing by Leveraging Process Parameters and Lattice Design
This study investigates the design of additive manufacturing for controlled crack propagation using process parameters and lattice structures. We examine two lattice types—octet-truss (OT) and diamond (DM)—fabricated via powder bed fusion with Ti-6Al-4V. Lattice structures are designed with varying...
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-11-01
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| Series: | Micromachines |
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| Online Access: | https://www.mdpi.com/2072-666X/15/11/1361 |
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| author | Jun Hak Lee Seong Je Park Jeongho Yang Seung Ki Moon Jiyong Park |
| author_facet | Jun Hak Lee Seong Je Park Jeongho Yang Seung Ki Moon Jiyong Park |
| author_sort | Jun Hak Lee |
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| description | This study investigates the design of additive manufacturing for controlled crack propagation using process parameters and lattice structures. We examine two lattice types—octet-truss (OT) and diamond (DM)—fabricated via powder bed fusion with Ti-6Al-4V. Lattice structures are designed with varying densities (10%, 30%, and 50%) and process using two different laser energies. Using additive-manufactured specimens, Charpy impact tests are conducted to evaluate the fracture behavior and impact energy levels of the specimens. Results show that the type of the lattice structures, the density of the lattice structures, and laser energy significantly influence crack propagation patterns and impact energy. OT exhibits straighter crack paths, while DM demonstrates more random fracture patterns. Higher-density lattices and increased laser energy generally improve the impact energy. DM consistently outperformed OT in the impact energy for angle specimens, while OT showed superior performance in stair specimens. Finally, a case study demonstrates the potential for combining OT and DM structures to guide crack propagation along predetermined paths, offering a novel approach to protect critical components during product failure. |
| format | Article |
| id | doaj-art-70d1376db43d439196505bc2c57d28d9 |
| institution | OA Journals |
| issn | 2072-666X |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj-art-70d1376db43d439196505bc2c57d28d92025-08-20T02:04:59ZengMDPI AGMicromachines2072-666X2024-11-011511136110.3390/mi15111361Crack Control in Additive Manufacturing by Leveraging Process Parameters and Lattice DesignJun Hak Lee0Seong Je Park1Jeongho Yang2Seung Ki Moon3Jiyong Park4Advanced Joining & Additive Manufacturing R&D Department, Korea Institute of Industrial Technology, 156 Gaetbeol-ro, Yeonsu-Gu, Incheon 21999, Republic of KoreaSingapore Centre for 3D Printing, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, SingaporeAdvanced Joining & Additive Manufacturing R&D Department, Korea Institute of Industrial Technology, 156 Gaetbeol-ro, Yeonsu-Gu, Incheon 21999, Republic of KoreaSingapore Centre for 3D Printing, School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, SingaporeAdvanced Joining & Additive Manufacturing R&D Department, Korea Institute of Industrial Technology, 156 Gaetbeol-ro, Yeonsu-Gu, Incheon 21999, Republic of KoreaThis study investigates the design of additive manufacturing for controlled crack propagation using process parameters and lattice structures. We examine two lattice types—octet-truss (OT) and diamond (DM)—fabricated via powder bed fusion with Ti-6Al-4V. Lattice structures are designed with varying densities (10%, 30%, and 50%) and process using two different laser energies. Using additive-manufactured specimens, Charpy impact tests are conducted to evaluate the fracture behavior and impact energy levels of the specimens. Results show that the type of the lattice structures, the density of the lattice structures, and laser energy significantly influence crack propagation patterns and impact energy. OT exhibits straighter crack paths, while DM demonstrates more random fracture patterns. Higher-density lattices and increased laser energy generally improve the impact energy. DM consistently outperformed OT in the impact energy for angle specimens, while OT showed superior performance in stair specimens. Finally, a case study demonstrates the potential for combining OT and DM structures to guide crack propagation along predetermined paths, offering a novel approach to protect critical components during product failure.https://www.mdpi.com/2072-666X/15/11/1361additive manufacturingcrack propagationlattice structuresimpact energy |
| spellingShingle | Jun Hak Lee Seong Je Park Jeongho Yang Seung Ki Moon Jiyong Park Crack Control in Additive Manufacturing by Leveraging Process Parameters and Lattice Design Micromachines additive manufacturing crack propagation lattice structures impact energy |
| title | Crack Control in Additive Manufacturing by Leveraging Process Parameters and Lattice Design |
| title_full | Crack Control in Additive Manufacturing by Leveraging Process Parameters and Lattice Design |
| title_fullStr | Crack Control in Additive Manufacturing by Leveraging Process Parameters and Lattice Design |
| title_full_unstemmed | Crack Control in Additive Manufacturing by Leveraging Process Parameters and Lattice Design |
| title_short | Crack Control in Additive Manufacturing by Leveraging Process Parameters and Lattice Design |
| title_sort | crack control in additive manufacturing by leveraging process parameters and lattice design |
| topic | additive manufacturing crack propagation lattice structures impact energy |
| url | https://www.mdpi.com/2072-666X/15/11/1361 |
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