Research on metallurgical bonding of selective laser melted AlSi10Mg alloy
The densification behavior, surface morphology and attendant microstructural characteristics of the selective laser melting (SLM) processed AlSi10Mg alloy affected by the processing parameters were systematically investigated. Increasing the laser scanning speed or hatch spacing will deteriorate the...
| 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 |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/ab6dae |
| _version_ | 1797747040384450560 |
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| author | Sensen Dong Xiaoxun Zhang Fang Ma Juze Jiang Wei Yang Zhixiong Lin Chuanbo chen |
| author_facet | Sensen Dong Xiaoxun Zhang Fang Ma Juze Jiang Wei Yang Zhixiong Lin Chuanbo chen |
| author_sort | Sensen Dong |
| collection | DOAJ |
| description | The densification behavior, surface morphology and attendant microstructural characteristics of the selective laser melting (SLM) processed AlSi10Mg alloy affected by the processing parameters were systematically investigated. Increasing the laser scanning speed or hatch spacing will deteriorate the metallurgical bonding between melt pools, resulting in the increase of irregular pores. Scanning speed and hatch spacing affect the liquid metallurgical bonding of melt pools in different ways. By manipulating scanning speed, the shape of the melt pool changes, resulting in different extents of metallurgical bonding. Whereas hatch spacing influences the resultant metallurgical bonding by controlling the overlapping rate between neighboring scan tracks simply. The formations of the hierarchical microstructures which discriminated by the Si phase are elucidated. Coarse zones are formed by the instantaneous existence of extremely high ratio of thermal gradient (G) and solidification rate (R) at the melt pool boundary, where solidification microstructure grows planar. Fine zones are formed by columnar-dendritic growth of microstructure. During the solidification process, the contraction forces that generated by the trapped gas in the pores and gravity are applied to the liquid around irregular pores and, forms the porous microstructures different from that in dense areas eventually. The tensile tests reveal that the tensile properties of SLM-processed samples are significantly affected by the formation of porosity. |
| first_indexed | 2024-03-12T15:45:27Z |
| format | Article |
| id | doaj.art-ce352fce0cf44ff6ba1c66791c260b49 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:45:27Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-ce352fce0cf44ff6ba1c66791c260b492023-08-09T15:28:39ZengIOP PublishingMaterials Research Express2053-15912020-01-017202580110.1088/2053-1591/ab6daeResearch on metallurgical bonding of selective laser melted AlSi10Mg alloySensen Dong0Xiaoxun Zhang1https://orcid.org/0000-0003-4326-4893Fang Ma2Juze Jiang3Wei Yang4Zhixiong Lin5Chuanbo chen6School of Materials Engineering, Shanghai University of Engineering Science , Shanghai 201620, People’s Republic of ChinaSchool of Materials Engineering, Shanghai University of Engineering Science , Shanghai 201620, People’s Republic of ChinaSchool of Mechanical and Automotive Engineering, Shanghai University of Engineering Science , Shanghai 201620, People’s Republic of ChinaSchool of Materials Engineering, Shanghai University of Engineering Science , Shanghai 201620, People’s Republic of ChinaSchool of Materials Engineering, Shanghai University of Engineering Science , Shanghai 201620, People’s Republic of ChinaSchool of Materials Engineering, Shanghai University of Engineering Science , Shanghai 201620, People’s Republic of ChinaSchool of Mechanical and Automotive Engineering, Shanghai University of Engineering Science , Shanghai 201620, People’s Republic of ChinaThe densification behavior, surface morphology and attendant microstructural characteristics of the selective laser melting (SLM) processed AlSi10Mg alloy affected by the processing parameters were systematically investigated. Increasing the laser scanning speed or hatch spacing will deteriorate the metallurgical bonding between melt pools, resulting in the increase of irregular pores. Scanning speed and hatch spacing affect the liquid metallurgical bonding of melt pools in different ways. By manipulating scanning speed, the shape of the melt pool changes, resulting in different extents of metallurgical bonding. Whereas hatch spacing influences the resultant metallurgical bonding by controlling the overlapping rate between neighboring scan tracks simply. The formations of the hierarchical microstructures which discriminated by the Si phase are elucidated. Coarse zones are formed by the instantaneous existence of extremely high ratio of thermal gradient (G) and solidification rate (R) at the melt pool boundary, where solidification microstructure grows planar. Fine zones are formed by columnar-dendritic growth of microstructure. During the solidification process, the contraction forces that generated by the trapped gas in the pores and gravity are applied to the liquid around irregular pores and, forms the porous microstructures different from that in dense areas eventually. The tensile tests reveal that the tensile properties of SLM-processed samples are significantly affected by the formation of porosity.https://doi.org/10.1088/2053-1591/ab6daeselective laser meltingAlSi10Mg alloymetallurgical bondingporous microstructuremechanical property |
| spellingShingle | Sensen Dong Xiaoxun Zhang Fang Ma Juze Jiang Wei Yang Zhixiong Lin Chuanbo chen Research on metallurgical bonding of selective laser melted AlSi10Mg alloy Materials Research Express selective laser melting AlSi10Mg alloy metallurgical bonding porous microstructure mechanical property |
| title | Research on metallurgical bonding of selective laser melted AlSi10Mg alloy |
| title_full | Research on metallurgical bonding of selective laser melted AlSi10Mg alloy |
| title_fullStr | Research on metallurgical bonding of selective laser melted AlSi10Mg alloy |
| title_full_unstemmed | Research on metallurgical bonding of selective laser melted AlSi10Mg alloy |
| title_short | Research on metallurgical bonding of selective laser melted AlSi10Mg alloy |
| title_sort | research on metallurgical bonding of selective laser melted alsi10mg alloy |
| topic | selective laser melting AlSi10Mg alloy metallurgical bonding porous microstructure mechanical property |
| url | https://doi.org/10.1088/2053-1591/ab6dae |
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