Ethanol liquid film-assisted nanosecond laser transmission welding for stainless steel and glass

文献类型： 外文期刊

第一作者： Zhao, Runhan

作者： Zhao, Runhan;Luo, Jingyi;Liu, Zhijiao;Fu, Jiajun;Liu, Chao;Wang, Qinghua;Zhang, Tairui;Li, Yide;Wang, Huixin;Wang, Huixin

作者机构：

关键词： Nanosecond laser; Laser welding; Dissimilar materials; Mechanical strength

期刊名称：JOURNAL OF MANUFACTURING PROCESSES （ 影响因子：6.8； 五年影响因子：7.0 ）

ISSN： 1526-6125

年卷期： 2025 年 149 卷

页码：

收录情况： SCI

摘要： This study introduces a novel nanosecond laser welding technique for efficiently joining silica glass to 304 stainless steel. A low-cost, fixture-free optical contact condition is realized through the anhydrous ethanol liquid film-assisted transmission welding (LFTW) method, utilizing surface tension and liquid pressure as alternatives to conventional external pressure. Two welding element configurations (straight lines and concentric circles) were systematically analyzed, and the effects of three scanning path strategies on weld strength were evaluated. The experimental results show that the scanning strategy involving an outer frame followed by interior filling significantly enhances joint shear strength, reaching a maximum value of 19.73 MPa. Furthermore, by applying this scanning path and comparing different operating conditions with and without an intermediate ethanol layer and with or without external pressure, it was found that the condition using an ethanol interlayer but no external mechanical pressure produced nearly equivalent joint strength to externally pressurized conditions, without requiring fixturing. This study also presents detailed observations of the welded interface microstructure and proposes bonding and fracture models to explain the fundamental mechanisms responsible for joint formation during nanosecond laser welding of dissimilar materials.

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