@article{Zhan2025, 
author = {Junmin Zhan and Guohua Wu and Xin Tong and Fangzhou Qi and Qiman Wang and Rui Jiang and Youjie Guo and Zhanyong Zhao and Peikang Bai},
title = {Exceptional mechanical properties of wire arc additive manufactured Mg-9Gd-3Y-0.5Zr alloy induced by promoted precipitation behavior},
year = {2025},
journal = {Journal of Magnesium and Alloys},
volume = {13},
number = {2},
pages = {562-570},
keywords = {Mg-Gd-Y-Zr alloy, Additive manufacturing, Precipitation behavior, Microstructure, Strengthening mechanism},
url = {https://www.sciopen.com/article/10.1016/j.jma.2024.01.027},
doi = {10.1016/j.jma.2024.01.027},
abstract = {Additive manufactured Mg-RE alloys usually show exceptional mechanical properties, which is mainly attributed to their refined grains in previous studies. Since Mg-RE series are typical age-hardenable alloys, this study focuses on the aging behavior of wire arc additive manufactured Mg-9Gd-3Y-0.5Zr (GW93K) alloy and compares it with the as-cast counterpart, providing a new insight into the strengthening mechanism of additive manufactured alloys. It was revealed that both the refined equiaxed α-Mg grains and small-sized (only 5~10 nm) β′ precipitates with an extremely high number density (~2.53 × 104 µm−2) should be considered for the strengthening mechanisms of the deposited alloy. The promoted precipitation behavior is facilitated by the dislocation pile-ups formed under multiple thermal cycles and a high cooling rate during deposition. As a result, the deposited alloy at peak-aged state exhibits better comprehensive properties of UTS=392 MPa and EL=3.3%, which is 19% and 18% higher than that of the cast sample, individually.}
}