A new phenomenon in a selective laser melted 316L stainless steel with a wider and higher laser energy density
Defects, boundaries, textures, tensile properties, fractographies, sub-grains, nano-oxide particles, and deformation twins in selective laser melted 316L stainless steel (SLM316LSS) were systematically characterized as functions of laser energy density. The defects, boundaries, textures of the as-bu...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424007324 |
| _version_ | 1797226610921832448 |
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| author | Zhiping Chen Fuzhu Wang Zhenjun Jiang Bin Chen Jianfei Hao Fangfang Liu Runxia Li Biao Wang Gang Liu |
| author_facet | Zhiping Chen Fuzhu Wang Zhenjun Jiang Bin Chen Jianfei Hao Fangfang Liu Runxia Li Biao Wang Gang Liu |
| author_sort | Zhiping Chen |
| collection | DOAJ |
| description | Defects, boundaries, textures, tensile properties, fractographies, sub-grains, nano-oxide particles, and deformation twins in selective laser melted 316L stainless steel (SLM316LSS) were systematically characterized as functions of laser energy density. The defects, boundaries, textures of the as-built SLM316LSS were shown to depend largely on the applied laser power. The porosity of the SLM316LSS significantly decreased with the increase laser power from 70 to 140 W (corresponding to the laser energy density from 116.7 to 233.3 J/mm3), while exhibiting a slight increase in the laser power range of 140–280 W (the laser energy density of 233.3–466.7 J/mm3). Additionally, the SLM316LSS specimen at a laser power of 140 W reached the hardness of ∼252 HV, the yield strength of ∼605 MPa and the ultimate tensile strength of ∼710 MPa, along with the elongation to fracture of ∼32.5%, respectively, due to the lowest defect concentration and the presence of twin boundaries and textures, combined with SiO2 nano-oxide particles and deformation twinning. However, the crack appeared in the SLM316LSS within the laser power range from 210 to 280 W (the laser energy density from 350.0 to 466.7 J/mm3), and the mean crystallite size was more than 50 μm, which insignificantly affected the mechanical properties of the steel compared with a laser power of 140 W. |
| first_indexed | 2024-04-24T14:27:39Z |
| format | Article |
| id | doaj.art-2dd3b44aad924500b76355d3d2285ba6 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-24T14:27:39Z |
| publishDate | 2024-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-2dd3b44aad924500b76355d3d2285ba62024-04-03T04:26:44ZengElsevierJournal of Materials Research and Technology2238-78542024-05-013017351750A new phenomenon in a selective laser melted 316L stainless steel with a wider and higher laser energy densityZhiping Chen0Fuzhu Wang1Zhenjun Jiang2Bin Chen3Jianfei Hao4Fangfang Liu5Runxia Li6Biao Wang7Gang Liu8Research Institute of Interdisciplinary Science & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, China; State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China; Guangdong Provincial Key Laboratory of Extreme Conditions, Dongguan, 523803, ChinaResearch Institute of Interdisciplinary Science & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, ChinaResearch Institute of Interdisciplinary Science & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, ChinaResearch Institute of Interdisciplinary Science & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, ChinaResearch Institute of Interdisciplinary Science & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, ChinaDepartment of Electromechanical Engineering, Guangdong University of Science and Technology, Dongguan, 523083, ChinaResearch Institute of Interdisciplinary Science & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, China; Guangdong Provincial Key Laboratory of Extreme Conditions, Dongguan, 523803, China; Corresponding author. Research Institute of Interdisciplinary Science & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, China.Research Institute of Interdisciplinary Science & School of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808, China; School of Physics and Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-Sen University, Guangzhou, 510275, China; Guangdong Provincial Key Laboratory of Extreme Conditions, Dongguan, 523803, China; Corresponding author. Guangdong Provincial Key Laboratory of Extreme Conditions, Dongguan, 523803, China.State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China; Corresponding author.Defects, boundaries, textures, tensile properties, fractographies, sub-grains, nano-oxide particles, and deformation twins in selective laser melted 316L stainless steel (SLM316LSS) were systematically characterized as functions of laser energy density. The defects, boundaries, textures of the as-built SLM316LSS were shown to depend largely on the applied laser power. The porosity of the SLM316LSS significantly decreased with the increase laser power from 70 to 140 W (corresponding to the laser energy density from 116.7 to 233.3 J/mm3), while exhibiting a slight increase in the laser power range of 140–280 W (the laser energy density of 233.3–466.7 J/mm3). Additionally, the SLM316LSS specimen at a laser power of 140 W reached the hardness of ∼252 HV, the yield strength of ∼605 MPa and the ultimate tensile strength of ∼710 MPa, along with the elongation to fracture of ∼32.5%, respectively, due to the lowest defect concentration and the presence of twin boundaries and textures, combined with SiO2 nano-oxide particles and deformation twinning. However, the crack appeared in the SLM316LSS within the laser power range from 210 to 280 W (the laser energy density from 350.0 to 466.7 J/mm3), and the mean crystallite size was more than 50 μm, which insignificantly affected the mechanical properties of the steel compared with a laser power of 140 W.http://www.sciencedirect.com/science/article/pii/S2238785424007324Additive manufacturing316L stainless steelSelective laser meltingLaser powerMicrostructural and mechanical properties |
| spellingShingle | Zhiping Chen Fuzhu Wang Zhenjun Jiang Bin Chen Jianfei Hao Fangfang Liu Runxia Li Biao Wang Gang Liu A new phenomenon in a selective laser melted 316L stainless steel with a wider and higher laser energy density Journal of Materials Research and Technology Additive manufacturing 316L stainless steel Selective laser melting Laser power Microstructural and mechanical properties |
| title | A new phenomenon in a selective laser melted 316L stainless steel with a wider and higher laser energy density |
| title_full | A new phenomenon in a selective laser melted 316L stainless steel with a wider and higher laser energy density |
| title_fullStr | A new phenomenon in a selective laser melted 316L stainless steel with a wider and higher laser energy density |
| title_full_unstemmed | A new phenomenon in a selective laser melted 316L stainless steel with a wider and higher laser energy density |
| title_short | A new phenomenon in a selective laser melted 316L stainless steel with a wider and higher laser energy density |
| title_sort | new phenomenon in a selective laser melted 316l stainless steel with a wider and higher laser energy density |
| topic | Additive manufacturing 316L stainless steel Selective laser melting Laser power Microstructural and mechanical properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424007324 |
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