@article{Li2025, 
author = {Jiamin Li and Meng Huang and Juan Hou and Xingbin Wang and Gaopeng Xu and Yi Yang and Ning Mo and Yun Shi and Laichang Zhang and Weineng Tang},
title = {Excellent strength-ductility synergy property of wire-arc additively manufactured Mg-Gd-Y-Zr alloy investigated by heat treatment},
year = {2025},
journal = {Journal of Magnesium and Alloys},
volume = {13},
number = {8},
pages = {3673-3688},
keywords = {Mg-Gd-Y-Zr alloy, Wire-arc additive manufacturing, Microstructure, Heat treatment, Strength-ductility synergy},
url = {https://www.sciopen.com/article/10.1016/j.jma.2025.03.026},
doi = {10.1016/j.jma.2025.03.026},
abstract = {In this work, the GW63K (Mg-6.54Gd-3.93Y-0.41Zr, wt.%) alloy wire was utilized as the feedstock material and the thin-walled component was fabricated using wire-arc additive manufacturing technology (WAAM). The microstructural evolution during deposition and subsequent heat treatment was explained through multi-scale microstructural characterization techniques, and the impact of heat treatment on the strength-ductility synergy of the deposited alloy was systematically compared. The results showed that the microstructure of the deposited sample was mainly composed of fine equiaxed α-Mg grains and Mg24(Gd,Y)5 phase. The optimized solution heat treatment (450 °C × 2 h) had little effect on the grain size, but can effectively reduce the Mg24(Gd,Y)5 eutectic phase on the grain boundary, resulting in a significant increase in elongation from 13.7% to 26.6%. After peak-aging treatment, the strength of the GW63K alloy increased to 370 MPa, which was significantly higher than the as-built state (267 MPa). The superior strength in this study is attributed to the refinement strengthening imparted by the fine microstructure inherited in the as-built GW63K alloy, as well as the precipitation strengthening due to the formation of dense β' precipitates with a pronounced plate-like aspect ratio.}
}