@article{Yi2025, 
author = {Lingfan Yi and Jiaxin Yu and Lianmei Wu and Yangyang Xu and Yuchuan Huang and Peng Sun and Qi Li and Wenxia Hu and Fei Li and Yuyan Tang and Guohua Wu and Wencai Liu},
title = {Microstructure evolution and strengthening mechanism of electron beam welded dual-phase Mg-8Li-3Al-2Zn-0.5Y alloy},
year = {2025},
journal = {Journal of Magnesium and Alloys},
volume = {13},
number = {11},
pages = {5404-5420},
keywords = {Electron beam welding, Mg-8Li-3Al-2Zn-0.5Y, Microstructure evolution, Mechanical properties, Strengthening mechanism},
url = {https://www.sciopen.com/article/10.1016/j.jma.2025.09.023},
doi = {10.1016/j.jma.2025.09.023},
abstract = {Nearly undamaged joints of electron beam welded (EBW) dual-phase Mg-8Li-3Al-2Zn-0.5Y alloy were achieved with joint coefficients exceeding 95%. All specimens were fractured at the base metal (BM), implying a significant departure from conventional fracture modes of welded joints. The fusion zone (FZ) consists of ultrafine acicular α-Mg and equiaxed β-Li, with grain sizes reduced by approximately 90% and 80%, respectively, compared to the base metal. This results in a significant increase in microhardness of about 40%. A unique multiphase mixture was observed in the heat-affected zone (HAZ), which mainly consists of lamellar eutectoid structures, fine precipitates zone, and numerous fine Mg3(Al, Zn) particles. This mixture was transformed from typical Li(Al, Zn) (a common softening phase) undergoing atomic diffusion and solid-state phase transformation during welding. It introduces a synergistic strengthening effect, making the heat-affected zone no longer the weakest part of the joint. This study provides valuable insights into the electron beam welding technology for Mg-Li alloys and offers theoretical support for manufacturing high-quality joints.}
}