Molten pool structure, temperature and velocity flow in selective laser melting AlCu5MnCdVA alloy
Selective Laser Melting (SLM) has become one of the most promising technologies in Metal Additive Manufacturing (MAM), which is a complex dynamic non-equilibrium process involving heat transfer, melting, phase transition, vaporization and mass transfer. The characteristics of the molten pool (struct...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/abadcf |
| _version_ | 1797746247500562432 |
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| author | Pan Lu Zhang Cheng-Lin Wang Liang Liu Tong Liu Jiang-lin |
| author_facet | Pan Lu Zhang Cheng-Lin Wang Liang Liu Tong Liu Jiang-lin |
| author_sort | Pan Lu |
| collection | DOAJ |
| description | Selective Laser Melting (SLM) has become one of the most promising technologies in Metal Additive Manufacturing (MAM), which is a complex dynamic non-equilibrium process involving heat transfer, melting, phase transition, vaporization and mass transfer. The characteristics of the molten pool (structure, temperature flow and velocity flow) have a decisive influence on the final forming quality of SLM. In this study, both numerical simulation and experiments were employed to study molten pool structure, temperature flow and velocity field in Selective Laser Melting AlCu5MnCdVA alloy. The results showed the structure of molten pool showed different forms (deep-concave structure, double-concave structure, plane structure, protruding structure and ideal planar structure), and the size of the molten pool was approximately 132 μ m × 107 μ m × 50 μ m: in the early stage, molten pool was in a state of deep-concave shape with a depth of 15 μ m due to multiple driving forces, while a protruding shape with a height of 10 μ m duo to tension gradient in the later stages of forming. The metal flow inside the molten pool was mainly driven by laser impact force, metal liquid gravity, surface tension and recoil pressure. For AlCu5MnCdVA alloy, metal liquid solidification speed was extremely fast (3.5 × 10 ^−4 S), the heating rate and cooling rate reached 6.5 × 10 ^7 K S ^−1 and 1.6 × 10 ^6 K S ^−1 , respectively. Choosing surface roughness as a visual standard, low-laser energy AlCu5MnCdVA alloy optimum process parameters window was obtained by numerical simulation: laser power 250 W, hatching space 0.11 mm, layer thickness 0.03 mm, laser scanning velocity 1.5 m s ^−1 . In addition, compared with experimental printing and numerical simulation, the width of the molten pool was about 205 um and about 210 um, respectively, and overlapping between two adjacent molten tracks was all about 65 um. The results showed that the numerical simulation results were basically consistent with the experimental print results, which proved the correctness of the numerical simulation model. |
| first_indexed | 2024-03-12T15:34:11Z |
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| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:34:11Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
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| series | Materials Research Express |
| spelling | doaj.art-2e4a0990817b45ba8a53ad36677506222023-08-09T16:18:03ZengIOP PublishingMaterials Research Express2053-15912020-01-017808651610.1088/2053-1591/abadcfMolten pool structure, temperature and velocity flow in selective laser melting AlCu5MnCdVA alloyPan Lu0https://orcid.org/0000-0001-8353-454XZhang Cheng-Lin1Wang Liang2Liu Tong3https://orcid.org/0000-0001-6075-5892Liu Jiang-lin4Aviation and Materials College, Anhui Technical College of Mechanical and Electrical Engineering , Wuhu Anhui 241000, People’s Republic of ChinaSchool of Engineering Science, University of Science and Technology of China , Hefei Anhui 230026, People’s Republic of ChinaAnhui Top Additive Manufacturing Technology Co., Ltd., Wuhu Anhui 241300, People’s Republic of ChinaAnhui Chungu 3D Printing Institute of Intelligent Equipment and Industrial Technology, Anhui 241300, People’s Republic of ChinaSchool of Mechanical and Transportation Engineering, Taiyuan University of Technology , Taiyuan Shanxi 030024, People’s Republic of ChinaSelective Laser Melting (SLM) has become one of the most promising technologies in Metal Additive Manufacturing (MAM), which is a complex dynamic non-equilibrium process involving heat transfer, melting, phase transition, vaporization and mass transfer. The characteristics of the molten pool (structure, temperature flow and velocity flow) have a decisive influence on the final forming quality of SLM. In this study, both numerical simulation and experiments were employed to study molten pool structure, temperature flow and velocity field in Selective Laser Melting AlCu5MnCdVA alloy. The results showed the structure of molten pool showed different forms (deep-concave structure, double-concave structure, plane structure, protruding structure and ideal planar structure), and the size of the molten pool was approximately 132 μ m × 107 μ m × 50 μ m: in the early stage, molten pool was in a state of deep-concave shape with a depth of 15 μ m due to multiple driving forces, while a protruding shape with a height of 10 μ m duo to tension gradient in the later stages of forming. The metal flow inside the molten pool was mainly driven by laser impact force, metal liquid gravity, surface tension and recoil pressure. For AlCu5MnCdVA alloy, metal liquid solidification speed was extremely fast (3.5 × 10 ^−4 S), the heating rate and cooling rate reached 6.5 × 10 ^7 K S ^−1 and 1.6 × 10 ^6 K S ^−1 , respectively. Choosing surface roughness as a visual standard, low-laser energy AlCu5MnCdVA alloy optimum process parameters window was obtained by numerical simulation: laser power 250 W, hatching space 0.11 mm, layer thickness 0.03 mm, laser scanning velocity 1.5 m s ^−1 . In addition, compared with experimental printing and numerical simulation, the width of the molten pool was about 205 um and about 210 um, respectively, and overlapping between two adjacent molten tracks was all about 65 um. The results showed that the numerical simulation results were basically consistent with the experimental print results, which proved the correctness of the numerical simulation model.https://doi.org/10.1088/2053-1591/abadcfSLMmolten poolAlCu5MnCdVA alloyheat flowvelocity flownumerical simulation |
| spellingShingle | Pan Lu Zhang Cheng-Lin Wang Liang Liu Tong Liu Jiang-lin Molten pool structure, temperature and velocity flow in selective laser melting AlCu5MnCdVA alloy Materials Research Express SLM molten pool AlCu5MnCdVA alloy heat flow velocity flow numerical simulation |
| title | Molten pool structure, temperature and velocity flow in selective laser melting AlCu5MnCdVA alloy |
| title_full | Molten pool structure, temperature and velocity flow in selective laser melting AlCu5MnCdVA alloy |
| title_fullStr | Molten pool structure, temperature and velocity flow in selective laser melting AlCu5MnCdVA alloy |
| title_full_unstemmed | Molten pool structure, temperature and velocity flow in selective laser melting AlCu5MnCdVA alloy |
| title_short | Molten pool structure, temperature and velocity flow in selective laser melting AlCu5MnCdVA alloy |
| title_sort | molten pool structure temperature and velocity flow in selective laser melting alcu5mncdva alloy |
| topic | SLM molten pool AlCu5MnCdVA alloy heat flow velocity flow numerical simulation |
| url | https://doi.org/10.1088/2053-1591/abadcf |
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