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学者姓名：肖荣诗
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Abstract ：
Micro-welding of Al and Cu foils is increasing used in various industries, particularly in the production of battery components for electric vehicles. However, direct fusion welding of Al and Cu may compromise joint mechanical properties due to the formation of brittle intermetallic compounds (IMC). Consequently, strategies for controlling IMC to enhance joint mechanical properties have received significant research attention. In this study, lap welds of 1050 Al foil and T2 Cu foil (both 200 mu m thick) are achieved using a single-mode fiber laser equipped with a scanning galvanometer. This setup enables spatial power modulation for laser spot welding via beam spiral scanning. Notably, laser fusion welding occurs along the laser beam scanning path, while laser weld-brazing is achieved through heat conduction in the spiral spacing between the adjacent scanning paths, resulting in a hybrid joint with alternated fused and brazed areas. The laser weld-brazing areas expand the effective connection area of the joint, improving its load-bearing capacity while effectively controlling IMC compared to fusion joints. The screw-type hybrid joints exhibit excellent mechanical properties, with a maximum tensile strength of 140 MPa. Experimental and simulation results indicate the mechanism for hybrid joint formation and improvement in mechanical properties. This study provides an effective strategy for regulating joint microstructure to mitigate the negative influence of IMC.
Keyword ：
Mechanical properties Mechanical properties Laser weld-brazing Laser weld-brazing Al/Cu dissimilar joint Al/Cu dissimilar joint Microstructure Microstructure Laser welding Laser welding
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| GB/T 7714 | Du, Weizhe , Huang, Xuting , Zheng, Min et al. Hybrid laser welding and brazing for controlling intermetallic compounds in Al/Cu dissimilar joint [J]. | OPTICS AND LASER TECHNOLOGY , 2024 , 180 . |
| MLA | Du, Weizhe et al. "Hybrid laser welding and brazing for controlling intermetallic compounds in Al/Cu dissimilar joint" . | OPTICS AND LASER TECHNOLOGY 180 (2024) . |
| APA | Du, Weizhe , Huang, Xuting , Zheng, Min , Xiao, Rongshi , Xu, Jiejie , Huang, Ting . Hybrid laser welding and brazing for controlling intermetallic compounds in Al/Cu dissimilar joint . | OPTICS AND LASER TECHNOLOGY , 2024 , 180 . |
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Abstract ：
Wire laser direct energy deposition enables the mass production of large-scale industrial components and parts. However, energy utilization efficiency is limited in conventional wire laser material deposition to avoid keyhole defects, resulting in a low deposition efficiency. This work presents a high-efficiency wire laser material deposition process that increases energy utilization by generating a keyhole in the filler wire, which can also avoid the keyhole defects in the deposited sample. The influence of process parameters on deposition quality and efficiency was thoroughly examined to determine the process window. A high deposition efficiency of 0.87 kg/(h kW) for 316L stainless steel was achieved with a laser power of 3 kW, approximately three times that of the conventional wire laser material deposition process. The defect-free multitrack and multilayer deposition demonstrated the feasibility of our proposed high-efficiency process.
Keyword ：
deposition efficiency deposition efficiency additive manufacturing additive manufacturing keyhole keyhole laser direct energy deposition laser direct energy deposition
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| GB/T 7714 | Xiao, Rongshi , Guo, Shihui , Zheng, Min et al. New method for high-efficiency keyhole-based wire direct energy deposition: Process innovation and characterization [J]. | JOURNAL OF LASER APPLICATIONS , 2024 , 36 (3) . |
| MLA | Xiao, Rongshi et al. "New method for high-efficiency keyhole-based wire direct energy deposition: Process innovation and characterization" . | JOURNAL OF LASER APPLICATIONS 36 . 3 (2024) . |
| APA | Xiao, Rongshi , Guo, Shihui , Zheng, Min , Zhu, Baoqi , Wu, Qiang , Xu, Jiejie et al. New method for high-efficiency keyhole-based wire direct energy deposition: Process innovation and characterization . | JOURNAL OF LASER APPLICATIONS , 2024 , 36 (3) . |
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Abstract ：
The micro-joining of Al foil and Cu foil is crucial for various industrial applications, such as manufacturing power lithium-ion batteries packs for electric and hybrid vehicles. An ongoing challenge in this process is the unsatisfactory joint strength, attributed to crack susceptibility and poor joint ductility. This issue is primarily caused by the continuous formation of an intermetallic compounds (IMC) layer between Al foil and Cu foil. This study investigates the microstructure and mechanical properties of Al/Cu lapped joints using laser spiral spot welding technique with a continuous-wave (CW) fiber laser. The research explores the effects of keyhole and molten pool flow on joint morphology and microstructure evolution, linking these aspects to joint fracture behaviors. The results demonstrate that CW laser spiral spot welding achieves defect-free joints with excellent mechanical properties. The controlled formation of IMC, alternated with ductile phases, effectively restricts crack propagation, enhancing shear strength and ductility. Optimal welding parameters, such as a laser power of 450 W and welding speed of 350 mm/s, yield joints with a maximum shear strength of 138.2 MPa, which represents a significant improvement over previous spiral spot welded joints and highlights the potential of CW laser welding for efficient and high-strength Al/Cu metal foil joints.
Keyword ：
Microstructure Microstructure Laser spiral welding Laser spiral welding Continuous-wave laser Continuous-wave laser Mechanical properties Mechanical properties
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| GB/T 7714 | Du, Weizhe , Dong, Guochen , Zou, Demin et al. Laser micro-joining of Al and Cu foils with high strength and ductility [J]. | OPTICS AND LASER TECHNOLOGY , 2024 , 175 . |
| MLA | Du, Weizhe et al. "Laser micro-joining of Al and Cu foils with high strength and ductility" . | OPTICS AND LASER TECHNOLOGY 175 (2024) . |
| APA | Du, Weizhe , Dong, Guochen , Zou, Demin , Cui, Xiaoyao , Xiao, Rongshi , Xu, Jiejie et al. Laser micro-joining of Al and Cu foils with high strength and ductility . | OPTICS AND LASER TECHNOLOGY , 2024 , 175 . |
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Abstract ：
本发明提供了一种柔性湿度传感器超短脉冲激光直写方法，包括以下步骤：S1：制备金属盐墨水，金属盐墨水包括金属盐、还原剂和去离子水；S2：提供柔性基底，将所述金属盐墨水覆盖在柔性基底表面，将超短脉冲激光聚焦在柔性基底和金属盐墨水形成的界面；通过第一工艺参数的激光直写在柔性基底表面的特定位置实现金属离子的还原沉积生成金属，从而形成导电电极；通过第二工艺参数的激光直写在柔性基底表面的特定位置实现金属离子的还原沉积生成金属氧化物，从而形成传感电极；S3：清洗激光作用后的柔性基底表面，得到导电电极和传感电极均集成在柔性基底表面的湿度传感器。本发明制备效率高，能够实现传感器结构的设计与制造，以及电极材料的调控。
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| GB/T 7714 | 黄婷 , 邢羚榕 , 肖荣诗 et al. 一种柔性湿度传感器超短脉冲激光直写方法 : CN202310295247.X[P]. | 2023-03-23 . |
| MLA | 黄婷 et al. "一种柔性湿度传感器超短脉冲激光直写方法" : CN202310295247.X. | 2023-03-23 . |
| APA | 黄婷 , 邢羚榕 , 肖荣诗 , 崔梦雅 . 一种柔性湿度传感器超短脉冲激光直写方法 : CN202310295247.X. | 2023-03-23 . |
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Abstract ：
本发明提供了一种铜表面双光束送丝式激光熔覆方法，包括如下步骤：在铜基体表面制备吸收层，以促进所述铜基体对激光能量的吸收；将第一激光束作用于丝材上，在所述丝材的端部诱导产生蒸发前沿，并以深熔模式吸收激光能量加热熔化所述丝材，所述丝材熔化形成金属液滴过渡到所述铜基体表面形成熔池，随着所述第一激光束移动熔池凝固形成连续的熔覆层；将第二激光束作用于铜基体表面，由此所述吸收层能够吸收所述第二激光束能量，以热导模式对所述铜基体进行局部预热。本发明可以显著提高材料的沉积效率，还可以有效地避免熔合不良、浸润性差、裂纹、气孔等缺陷的形成。
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| GB/T 7714 | 黄婷 , 罗鹏 , 肖荣诗 . 一种铜表面双光束送丝式激光熔覆方法 : CN202210380699.3[P]. | 2022-04-12 . |
| MLA | 黄婷 et al. "一种铜表面双光束送丝式激光熔覆方法" : CN202210380699.3. | 2022-04-12 . |
| APA | 黄婷 , 罗鹏 , 肖荣诗 . 一种铜表面双光束送丝式激光熔覆方法 : CN202210380699.3. | 2022-04-12 . |
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Abstract ：
一种原位测量激光焊接羽辉中微粒运动速度的方法，属于激光焊接技术领域。本发明的特征在于：在激光焊接中，探测激光束穿过羽辉后，部分光被羽辉中微粒反射回探测激光腔内产生自混合效应。根据探测激光器的电压自混合干涉信号，可获得被测微粒的尺寸和微粒经过探测激光斑的信号时间，利用被测微粒尺寸与信号时间之比即可为微粒的运动速度。本发明具有系统结构简单、体积小、易于调节、无需外部干涉、不受探测激光功率波动影响、成本低廉等优点，能够原位实时测量不同位置处羽辉中微粒的运动速度等特征。
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| GB/T 7714 | 邹江林 , 黄泽泓 , 王紫 et al. 一种原位测量激光焊接羽辉中微粒速度的方法 : CN202210153142.6[P]. | 2022-02-18 . |
| MLA | 邹江林 et al. "一种原位测量激光焊接羽辉中微粒速度的方法" : CN202210153142.6. | 2022-02-18 . |
| APA | 邹江林 , 黄泽泓 , 王紫 , 龚晋杰 , 肖荣诗 . 一种原位测量激光焊接羽辉中微粒速度的方法 : CN202210153142.6. | 2022-02-18 . |
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Abstract ：
一种直接观察激光焊接中光斑作用区动态行为的方法，属于激光材料加工领域。本发明的特征为：采用外加电弧等离子体改变激光深熔焊接小孔内喷发羽辉的发光特征和烧除羽辉中的微粒，并使用照明激光辐照焊接熔池，高速摄像机镜头前面配置与照明激光波长一致的带通滤波片与光强衰减片直接观测熔池中的激光作用区。激光焊接过程中的能量耦合过程、焊接缺陷的产生均与激光作用区的动态行为直接相关。使用该方法能够直接清晰观察激光作用区的动态行为，有望建立该动态行为与焊接缺陷产生过程的对应关系，实现激光智能制造中焊接过程质量的准确监测。此外，本发明具有系统结构简单、易于操作、成本低廉等优点。
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| GB/T 7714 | 邹江林 , 赵振家 , 孔华 et al. 一种直接观察激光焊接中光斑作用区动态行为的方法 : CN202210183118.7[P]. | 2022-02-28 . |
| MLA | 邹江林 et al. "一种直接观察激光焊接中光斑作用区动态行为的方法" : CN202210183118.7. | 2022-02-28 . |
| APA | 邹江林 , 赵振家 , 孔华 , 肖荣诗 . 一种直接观察激光焊接中光斑作用区动态行为的方法 : CN202210183118.7. | 2022-02-28 . |
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Abstract ：
本申请涉及激光振镜技术领域，提供一种激光扫描振镜系统。激光扫描振镜系统，包括平面反射振镜和曲面反射振镜；所述平面反射振镜，用于将激光束反射到曲面反射振镜；所述曲面反射振镜，用于对激光束进行聚焦并将激光束反射到工作面。根据本申请实施例的激光扫描振镜系统，实现了通过曲面反射振镜对激光束进行聚焦并将激光束反射到工作面上，无需提前对激光束进行动态聚焦，减少了使用的光学结构数量，装配简单，避免装配时出现较大的机械误差。
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| GB/T 7714 | 苏坤 , 杜伟哲 , 黄婷 et al. 激光扫描振镜系统 : CN202210657696.X[P]. | 2022-06-10 . |
| MLA | 苏坤 et al. "激光扫描振镜系统" : CN202210657696.X. | 2022-06-10 . |
| APA | 苏坤 , 杜伟哲 , 黄婷 , 肖荣诗 . 激光扫描振镜系统 : CN202210657696.X. | 2022-06-10 . |
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Abstract ：
本发明提供了一种模拟复合材料与金属激光连接温度场的方法，属于激光先进制造领域。针对复合材料与金属材料激光连接的过程，建立了一个连续纤维增强树脂基复合材料与金属激光连接的有限元三维模型，复合材料部分根据实际样品进行分层处理，并且根据纤维预浸带的铺层方式和方向设置材料物理属性为各向异性，能够准确预测复合材料与金属材料异质结构接头激光连接过程中的温度场分布。本发明具有较高的普适性，能够准确反映连续纤维对复合材料与金属激光连接过程中温度场的影响，通过计算连续纤维增强树脂基复合材料与金属激光连接接头的温度场，预测激光连接工艺窗口，为实际工程和科学研究起到预测和指导作用。
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| GB/T 7714 | 肖荣诗 , 景若木 , 黄婷 . 一种模拟复合材料与金属激光连接温度场的方法 : CN202210423118.X[P]. | 2022-04-21 . |
| MLA | 肖荣诗 et al. "一种模拟复合材料与金属激光连接温度场的方法" : CN202210423118.X. | 2022-04-21 . |
| APA | 肖荣诗 , 景若木 , 黄婷 . 一种模拟复合材料与金属激光连接温度场的方法 : CN202210423118.X. | 2022-04-21 . |
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Abstract ：
本发明涉及激光焊接技术领域，提供一种喷嘴及振镜激光焊接气体保护装置，喷嘴包括进气管和喷嘴本体，所述喷嘴本体的第一侧设有进气口，所述进气口与所述进气管连接，所述喷嘴本体的第二侧设有出气口；所述喷嘴本体的内部构造有气流转化区域，所述气流转化区域适于将从所述进气口进入喷嘴本体内部的气体由紊流转化为层流，并从所述出气口排出。本发明提供的喷嘴，能够实现保护气体的稳定喷射，进而有效改善焊接质量。本申请提供的振镜激光焊接气体保护装置，能够与振镜的控制系统协同控制，从而自动定位工件位置并实施气体保护。
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| GB/T 7714 | 杜伟哲 , 苏坤 , 黄婷 et al. 喷嘴及振镜激光焊接气体保护装置 : CN202210663911.7[P]. | 2022-06-10 . |
| MLA | 杜伟哲 et al. "喷嘴及振镜激光焊接气体保护装置" : CN202210663911.7. | 2022-06-10 . |
| APA | 杜伟哲 , 苏坤 , 黄婷 , 肖荣诗 . 喷嘴及振镜激光焊接气体保护装置 : CN202210663911.7. | 2022-06-10 . |
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