文献类型：期刊文献

英文题名：The effect of evaporation on laser-induced wetting and spreading behaviors of Mg alloy on Cu-coated steel substrates

作者：Xu, Wenhu[1,2];Shi, Junmiao[2];Li, Haoyue[3];Zhao, Zheng[2];Shi, Jiayang[2];Dou, Tianyu[1];Tian, Jianian[1];Tan, Caiwang[3];Li, Yulong[4];Yang, Jin[1]

机构：[1]Shanghai Univ Engn Sci, Sch Mat Engn, Shanghai 201620, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[3]Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China;[4]Nanchang Univ, Sch Adv Mfg, Jiangxi Key Lab Intelligent Robot, Nanchang 330031, Peoples R China

年份：2026

卷号：195

外文期刊名：OPTICS AND LASER TECHNOLOGY

收录：;EI(收录号：20255219767230);WOS:【SCI-EXPANDED(收录号:WOS:001650073300001)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 52275155 and 52205395), "Dawn" Program of Shanghai Education Commission in China (No. 23SG50).

语种：英文

外文关键词：Evaporation; Magnesium/steel; Wetting behavior; Spreading kinetics

摘要：This work systematically investigated the effect of evaporation on the non-isothermal wetting behavior of liquid Mg on Cu-coated steel substrates using a laser-induced dynamic droplet method. The results indicated that wetting behavior was significantly governed by laser power, which controlled both the evaporation rate and temperature. At low laser powers (<2500 W), evaporation consumed the energy available for wetting, resulting in a non-wetting state. Conversely, as the temperature increased, intensified Cu diffusion into the Mg melt promoted the formation of Mg2Cu intermetallic compounds (IMCs) and reduced surface tension, thereby improving wettability. However, when the laser power exceeded 3000 W-especially at temperatures above the boiling point of Mg-evaporation increased dramatically. This process reduced the droplet volume and caused the contact radius (CR) to retract. Although the dissolution of the Cu coating and the formation of Mg2Cu stabilized the contact angle (CA) at approximately 23 degrees, the intense evaporation severely hindered further spreading. This study reveals a complex interplay among evaporation, temperature, and interfacial reactions that critically controls the wetting dynamics of Mg on Cu-coated steel. These findings provide crucial insights for optimizing Mg-based alloy joining and coating technologies under non-isothermal conditions.