Research on quality and performance of FRM laser welded joints with different shaft length ratios elliptical trajectory
The emerging Flexible Ring Mode(FRM) laser technology has shown great potential for welding copper and its alloys with high reflectivity and has been widely used. The design of the welding trajectory significantly affects the porosity and performance of welded joints. This paper first selects the el...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423017775 |
| _version_ | 1797646694801735680 |
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| author | Yang Zhang Jieshi Chen Wenshuai Zhang Shanglei Yang Zhengguo Yue Jianwu Ding Hao Lu Kejin Zhang |
| author_facet | Yang Zhang Jieshi Chen Wenshuai Zhang Shanglei Yang Zhengguo Yue Jianwu Ding Hao Lu Kejin Zhang |
| author_sort | Yang Zhang |
| collection | DOAJ |
| description | The emerging Flexible Ring Mode(FRM) laser technology has shown great potential for welding copper and its alloys with high reflectivity and has been widely used. The design of the welding trajectory significantly affects the porosity and performance of welded joints. This paper first selects the ellipse and its parameters from the three trajectories by numerical simulation method, then studies the appearance forming and counts the weld porosity through the longitudinal and cross-section developing quality, and finally uses a high-speed camera to monitor the copper Behavior of molten pool and spot oscillation process at the front of the plate. It is found that the trajectory of circular motion has a more stable heating process and has a preheating function for the center of the weld. Compared with linear welding, orbital welding achieves penetration of weld seam and forms better weld seam. Laser confocal tests show that S4(a1b0.5) has the most negligible variation in weld appearance and the best formability. S3(a0.5b0.5) has the lowest porosity, which also explains the mechanism of laser welding trajectory stirring the molten pool and pooling of pores under hydrostatic pressure. The tensile test shows that: S3 has the highest tensile strength (215.35 MPa), 89.79% of the base material. But its strain is only 50% of that of the S4 sample with almost the same tensile strength (215.03 MPa). Therefore, this paper proposes that an elliptical welding trajectory can be adopted to obtain welded joints with better tensile strength and plasticity, with the long axis along the welding direction and the short axis perpendicular to the welding direction. This study provides theoretical guidance for the optimal oscillation mode selection for tunable ring mode laser welding of highly reflective materials. |
| first_indexed | 2024-03-11T15:06:28Z |
| format | Article |
| id | doaj.art-024bcb4e3a004ec0af1312a859f29588 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:06:28Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-024bcb4e3a004ec0af1312a859f295882023-10-30T06:02:56ZengElsevierJournal of Materials Research and Technology2238-78542023-09-012611361150Research on quality and performance of FRM laser welded joints with different shaft length ratios elliptical trajectoryYang Zhang0Jieshi Chen1Wenshuai Zhang2Shanglei Yang3Zhengguo Yue4Jianwu Ding5Hao Lu6Kejin Zhang7School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai 201602, ChinaSchool of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai 201602, China; School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Corresponding author. School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai 201602, China.School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai 201602, ChinaSchool of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai 201602, ChinaZhejiang Chenguang Cable Co., Ltd., Pinghu, 314204, ChinaGW Laser Technology LLC, Shanghai, 201702, ChinaSchool of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, ChinaSchool of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China; Corresponding author.The emerging Flexible Ring Mode(FRM) laser technology has shown great potential for welding copper and its alloys with high reflectivity and has been widely used. The design of the welding trajectory significantly affects the porosity and performance of welded joints. This paper first selects the ellipse and its parameters from the three trajectories by numerical simulation method, then studies the appearance forming and counts the weld porosity through the longitudinal and cross-section developing quality, and finally uses a high-speed camera to monitor the copper Behavior of molten pool and spot oscillation process at the front of the plate. It is found that the trajectory of circular motion has a more stable heating process and has a preheating function for the center of the weld. Compared with linear welding, orbital welding achieves penetration of weld seam and forms better weld seam. Laser confocal tests show that S4(a1b0.5) has the most negligible variation in weld appearance and the best formability. S3(a0.5b0.5) has the lowest porosity, which also explains the mechanism of laser welding trajectory stirring the molten pool and pooling of pores under hydrostatic pressure. The tensile test shows that: S3 has the highest tensile strength (215.35 MPa), 89.79% of the base material. But its strain is only 50% of that of the S4 sample with almost the same tensile strength (215.03 MPa). Therefore, this paper proposes that an elliptical welding trajectory can be adopted to obtain welded joints with better tensile strength and plasticity, with the long axis along the welding direction and the short axis perpendicular to the welding direction. This study provides theoretical guidance for the optimal oscillation mode selection for tunable ring mode laser welding of highly reflective materials.http://www.sciencedirect.com/science/article/pii/S2238785423017775CopperFlexible ring modeElliptical trajectoryPorosityProperties |
| spellingShingle | Yang Zhang Jieshi Chen Wenshuai Zhang Shanglei Yang Zhengguo Yue Jianwu Ding Hao Lu Kejin Zhang Research on quality and performance of FRM laser welded joints with different shaft length ratios elliptical trajectory Journal of Materials Research and Technology Copper Flexible ring mode Elliptical trajectory Porosity Properties |
| title | Research on quality and performance of FRM laser welded joints with different shaft length ratios elliptical trajectory |
| title_full | Research on quality and performance of FRM laser welded joints with different shaft length ratios elliptical trajectory |
| title_fullStr | Research on quality and performance of FRM laser welded joints with different shaft length ratios elliptical trajectory |
| title_full_unstemmed | Research on quality and performance of FRM laser welded joints with different shaft length ratios elliptical trajectory |
| title_short | Research on quality and performance of FRM laser welded joints with different shaft length ratios elliptical trajectory |
| title_sort | research on quality and performance of frm laser welded joints with different shaft length ratios elliptical trajectory |
| topic | Copper Flexible ring mode Elliptical trajectory Porosity Properties |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423017775 |
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