Synergistic toughening of welds through adding SiC nanoparticles and modulating oscillating laser
To enhance the strengths of welds on AZ31B Mg alloy, silicon carbide (SiC) nanoparticles can be added in welds to improve mechanical properties of welds. However, SiC nanoparticles have high-level of surface energy, the physical properties of SiC nanoparticles are significantly different from Mg all...
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Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425000699 |
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| author | Mingjun Zhang Rui Wang Xiaobing Pang Jian Zhang Cong Mao Bo Cheng Longzhou Dai Heqing Li Jing Guo Zhuming Bi |
| author_facet | Mingjun Zhang Rui Wang Xiaobing Pang Jian Zhang Cong Mao Bo Cheng Longzhou Dai Heqing Li Jing Guo Zhuming Bi |
| author_sort | Mingjun Zhang |
| collection | DOAJ |
| description | To enhance the strengths of welds on AZ31B Mg alloy, silicon carbide (SiC) nanoparticles can be added in welds to improve mechanical properties of welds. However, SiC nanoparticles have high-level of surface energy, the physical properties of SiC nanoparticles are significantly different from Mg alloy, and these tend to cause the instability of a molten pool and a keyhole in laser-welding. This study proposed to modulate the power of an oscillating laser and control the temporal and spatial distribution of laser energy to strengthen welds when SiC nanoparticles are applied to join AZ31B Mg alloy. The effects of power modulation on macroscopic morphology, microstructure, and mechanical properties of welds were investigated systematically. The experiments showed that an oscillating laser with the modulated power has not only reduced various defects including spatters, weld beads, and humping significantly; but also decreased gas porosities in welds and eliminated an agglomeration of nanoparticles. At a modulation frequency of 150 Hz, the average size of grains was refined from 24.30 to 5.87 μm, and the maximum intensity at the 0001 direction of texture had a reduction over 86%. By comparing with the mechanical properties of base materials, the ultimate tensile strength was increased to 239 MPa (96.3%) and the elongation at the fracture point reaches 12.75% (53.5%). By comparing the welds by the laser welding without (i) adding nanoparticles and (ii) power modulation, the proposed method has increased the tensile strength by 12.7% and 10.1% and the elongation by 45.9% and 20.9%, respectively. |
| format | Article |
| id | doaj-art-ee1e3a2303ec4c89aa41bd02415683f6 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-ee1e3a2303ec4c89aa41bd02415683f62025-01-19T06:26:05ZengElsevierJournal of Materials Research and Technology2238-78542025-03-013512101225Synergistic toughening of welds through adding SiC nanoparticles and modulating oscillating laserMingjun Zhang0Rui Wang1Xiaobing Pang2Jian Zhang3Cong Mao4Bo Cheng5Longzhou Dai6Heqing Li7Jing Guo8Zhuming Bi9Hunan Provincial Key Laboratory of Intelligent Manufacturing Technology for High-performance Mechanical Equipment, Changsha University of Science and Technology, Changsha, 410114, China; Corresponding author.Hunan Provincial Key Laboratory of Intelligent Manufacturing Technology for High-performance Mechanical Equipment, Changsha University of Science and Technology, Changsha, 410114, ChinaCollege of Mechanical and Electrical Engineering, Changsha University, Changsha, 410022, ChinaHunan Provincial Key Laboratory of Intelligent Manufacturing Technology for High-performance Mechanical Equipment, Changsha University of Science and Technology, Changsha, 410114, ChinaHunan Provincial Key Laboratory of Intelligent Manufacturing Technology for High-performance Mechanical Equipment, Changsha University of Science and Technology, Changsha, 410114, ChinaHunan Provincial Key Laboratory of Intelligent Manufacturing Technology for High-performance Mechanical Equipment, Changsha University of Science and Technology, Changsha, 410114, ChinaHunan Provincial Key Laboratory of Intelligent Manufacturing Technology for High-performance Mechanical Equipment, Changsha University of Science and Technology, Changsha, 410114, ChinaHunan Provincial Key Laboratory of Intelligent Manufacturing Technology for High-performance Mechanical Equipment, Changsha University of Science and Technology, Changsha, 410114, ChinaHunan Baohuifeng New Material Technology Co., Ltd, Huaihua, 418000, ChinaDepartment of Civil and Mechanical Engineering, Purdue University Fort Wayne, Fort Wayne, IN, 46805, USATo enhance the strengths of welds on AZ31B Mg alloy, silicon carbide (SiC) nanoparticles can be added in welds to improve mechanical properties of welds. However, SiC nanoparticles have high-level of surface energy, the physical properties of SiC nanoparticles are significantly different from Mg alloy, and these tend to cause the instability of a molten pool and a keyhole in laser-welding. This study proposed to modulate the power of an oscillating laser and control the temporal and spatial distribution of laser energy to strengthen welds when SiC nanoparticles are applied to join AZ31B Mg alloy. The effects of power modulation on macroscopic morphology, microstructure, and mechanical properties of welds were investigated systematically. The experiments showed that an oscillating laser with the modulated power has not only reduced various defects including spatters, weld beads, and humping significantly; but also decreased gas porosities in welds and eliminated an agglomeration of nanoparticles. At a modulation frequency of 150 Hz, the average size of grains was refined from 24.30 to 5.87 μm, and the maximum intensity at the 0001 direction of texture had a reduction over 86%. By comparing with the mechanical properties of base materials, the ultimate tensile strength was increased to 239 MPa (96.3%) and the elongation at the fracture point reaches 12.75% (53.5%). By comparing the welds by the laser welding without (i) adding nanoparticles and (ii) power modulation, the proposed method has increased the tensile strength by 12.7% and 10.1% and the elongation by 45.9% and 20.9%, respectively.http://www.sciencedirect.com/science/article/pii/S2238785425000699Laser weldingPower modulationAZ31B Mg alloyWeld formationSiC nanoparticlesProperties of welds |
| spellingShingle | Mingjun Zhang Rui Wang Xiaobing Pang Jian Zhang Cong Mao Bo Cheng Longzhou Dai Heqing Li Jing Guo Zhuming Bi Synergistic toughening of welds through adding SiC nanoparticles and modulating oscillating laser Journal of Materials Research and Technology Laser welding Power modulation AZ31B Mg alloy Weld formation SiC nanoparticles Properties of welds |
| title | Synergistic toughening of welds through adding SiC nanoparticles and modulating oscillating laser |
| title_full | Synergistic toughening of welds through adding SiC nanoparticles and modulating oscillating laser |
| title_fullStr | Synergistic toughening of welds through adding SiC nanoparticles and modulating oscillating laser |
| title_full_unstemmed | Synergistic toughening of welds through adding SiC nanoparticles and modulating oscillating laser |
| title_short | Synergistic toughening of welds through adding SiC nanoparticles and modulating oscillating laser |
| title_sort | synergistic toughening of welds through adding sic nanoparticles and modulating oscillating laser |
| topic | Laser welding Power modulation AZ31B Mg alloy Weld formation SiC nanoparticles Properties of welds |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425000699 |
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