Author Identifier
Laichang Zhang: https://orcid.org/0000-0003-0661-2051
Document Type
Journal Article
Publication Title
Journal of Magnesium and Alloys
Publisher
Elsevier
School
Centre for Advanced Materials and Manufacturing / School of Engineering
Funders
Industrial Collaborative Innovation Project of Shanghai (XTCX-KJ-2022–2–11) / National Natural Science Foundation of China (52073176)
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.
DOI
10.1016/j.jma.2025.03.026
Creative Commons License
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Comments
Li, J., Huang, M., Hou, J., Wang, X., Xu, G., Yang, Y., Mo, N., Shi, Y., Zhang, L., & Tang, W. (2025). Excellent strength-ductility synergy property of wire-arc additively manufactured Mg-Gd-Y-Zr alloy investigated by heat treatment. Journal of Magnesium and Alloys. Advance online publication. https://doi.org/10.1016/j.jma.2025.03.026