A study on the influence of powder packing density on the melt track in the selective laser melting process
A numerical model was employed to mimic the selective laser melting (SLM) process. The powder bed following Gaussian distribution was generated by using the discrete element method (DEM). Different packing densities of the powder bed were generated by applying a compression force along the build...
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| Main Authors: | , , |
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| 其他作者: | |
| 格式: | Conference or Workshop Item |
| 語言: | English |
| 出版: |
2018
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| 主題: | |
| 在線閱讀: | https://hdl.handle.net/10356/88702 http://hdl.handle.net/10220/45999 |
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| 機構: | Nanyang Technological University |
| 語言: | English |
| 總結: | A numerical model was employed to mimic the selective laser melting (SLM)
process. The powder bed following Gaussian distribution was generated by using the discrete
element method (DEM). Different packing densities of the powder bed were generated by
applying a compression force along the build direction. The melt track characteristics were
simulated using a computational fluids dynamics (CFD) model. An average powder diameter of 27
μm and a layer thickness of 50 μm were used in this model. The study found that the powder
packing density significantly affects the melt track characteristics. Increase in the packing density
leads to an increase in the melt track height while reducing the melt track depth and melt track
width. |
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