Effect of Feature Size on Defects, Microstructure, and Mechanical Properties of Selective Laser Melted AlSi10Mg Lattice Structure
Selective laser melting lightweight lattice structures have broad application prospects in the aerospace field. Understanding the dependence of mechanical performance on feature size is crucial for structure design. This work optimized the process parameters based on large-size metal blocks (20 mm)...
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MDPI AG
2025-01-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/15/1/77 |
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| author | Chengkuan Peng Junfeng Qi Sheng Zhou Sanqiang Yang Ran Tao Heng Shao Weining Li |
| author_facet | Chengkuan Peng Junfeng Qi Sheng Zhou Sanqiang Yang Ran Tao Heng Shao Weining Li |
| author_sort | Chengkuan Peng |
| collection | DOAJ |
| description | Selective laser melting lightweight lattice structures have broad application prospects in the aerospace field. Understanding the dependence of mechanical performance on feature size is crucial for structure design. This work optimized the process parameters based on large-size metal blocks (20 mm) and then fabricated submillimeter features with a size of 0.4~1.0 mm. The influence of feature size on the defects, microstructures, and mechanical properties was investigated. The results showed that the dimensional errors for all size features were above 15%. When matched with appropriate border offset, these features could be printed precisely. The densification of submillimeter features was more than 99%, demonstrating the applicability of the optimized process parameters for the fine features. The porosity and relative roughness decreased and tended to stabilize with increasing feature size. Due to having less defects, the thicker features exhibited better mechanical properties in terms of ultimate strength and elongation. After being processed with polishing treatment, the roughness was reduced below 1 μm and the tensile strength increased above 320 MPa. The elastic modulus, yield strength, and elongation were also significantly improved. |
| format | Article |
| id | doaj-art-9c9d913d43f441f8b99bf9b8fd35837c |
| institution | Kabale University |
| issn | 2075-4701 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj-art-9c9d913d43f441f8b99bf9b8fd35837c2025-01-24T13:41:36ZengMDPI AGMetals2075-47012025-01-011517710.3390/met15010077Effect of Feature Size on Defects, Microstructure, and Mechanical Properties of Selective Laser Melted AlSi10Mg Lattice StructureChengkuan Peng0Junfeng Qi1Sheng Zhou2Sanqiang Yang3Ran Tao4Heng Shao5Weining Li6Beijing Spacecraft Manufacturing Co., Ltd., China Academy of Space Technology, Beijing 100094, ChinaBeijing Spacecraft Manufacturing Co., Ltd., China Academy of Space Technology, Beijing 100094, ChinaInstitute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, ChinaBeijing Spacecraft Manufacturing Co., Ltd., China Academy of Space Technology, Beijing 100094, ChinaInstitute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, ChinaBeijing Spacecraft Manufacturing Co., Ltd., China Academy of Space Technology, Beijing 100094, ChinaBeijing Spacecraft Manufacturing Co., Ltd., China Academy of Space Technology, Beijing 100094, ChinaSelective laser melting lightweight lattice structures have broad application prospects in the aerospace field. Understanding the dependence of mechanical performance on feature size is crucial for structure design. This work optimized the process parameters based on large-size metal blocks (20 mm) and then fabricated submillimeter features with a size of 0.4~1.0 mm. The influence of feature size on the defects, microstructures, and mechanical properties was investigated. The results showed that the dimensional errors for all size features were above 15%. When matched with appropriate border offset, these features could be printed precisely. The densification of submillimeter features was more than 99%, demonstrating the applicability of the optimized process parameters for the fine features. The porosity and relative roughness decreased and tended to stabilize with increasing feature size. Due to having less defects, the thicker features exhibited better mechanical properties in terms of ultimate strength and elongation. After being processed with polishing treatment, the roughness was reduced below 1 μm and the tensile strength increased above 320 MPa. The elastic modulus, yield strength, and elongation were also significantly improved.https://www.mdpi.com/2075-4701/15/1/77selective laser meltinglattice structuresize effectdimensional accuracyAlSi10Mg |
| spellingShingle | Chengkuan Peng Junfeng Qi Sheng Zhou Sanqiang Yang Ran Tao Heng Shao Weining Li Effect of Feature Size on Defects, Microstructure, and Mechanical Properties of Selective Laser Melted AlSi10Mg Lattice Structure Metals selective laser melting lattice structure size effect dimensional accuracy AlSi10Mg |
| title | Effect of Feature Size on Defects, Microstructure, and Mechanical Properties of Selective Laser Melted AlSi10Mg Lattice Structure |
| title_full | Effect of Feature Size on Defects, Microstructure, and Mechanical Properties of Selective Laser Melted AlSi10Mg Lattice Structure |
| title_fullStr | Effect of Feature Size on Defects, Microstructure, and Mechanical Properties of Selective Laser Melted AlSi10Mg Lattice Structure |
| title_full_unstemmed | Effect of Feature Size on Defects, Microstructure, and Mechanical Properties of Selective Laser Melted AlSi10Mg Lattice Structure |
| title_short | Effect of Feature Size on Defects, Microstructure, and Mechanical Properties of Selective Laser Melted AlSi10Mg Lattice Structure |
| title_sort | effect of feature size on defects microstructure and mechanical properties of selective laser melted alsi10mg lattice structure |
| topic | selective laser melting lattice structure size effect dimensional accuracy AlSi10Mg |
| url | https://www.mdpi.com/2075-4701/15/1/77 |
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