@article{Li2026, 
author = {Xin Li and Hailong Shi and Xuejian Li and Weimin Gan and Chao Xu and Chao Ding and Sarvar Tursunbaev and Nodir Turakhodjaev and Xiaoshi Hu and Xiaojun Wang},
title = {Effect of RE/Zn atomic ratio on the microstructure of Mg-Zn-Gd-Y alloys during rolling process: A new composition design strategy for high-strength and high-thermal-conductivity magnesium alloy},
year = {2026},
journal = {Journal of Magnesium and Alloys},
volume = {16},
number = {C},
keywords = {Twin, Rolling, Composition design, Mg-Zn-Gd-Y alloy, W phase},
url = {https://www.sciopen.com/article/10.1016/j.jma.2025.06.029},
doi = {10.1016/j.jma.2025.06.029},
abstract = {The design of high-strength and high-thermal-conductivity magnesium alloy sheets is challenged by the inherent contradiction between strength and thermal conductivity, as well as the complex variables involved in the rolling process. In this study, Mg-xZn-0.5Gd-0.5Y (at.%) (1/x = 0.5, 1.0, 1.5) alloys were developed by adjusting the atomic ratio of rare earth (RE) elements to Zn. In the subsequent multi-pass hot rolling process, the influence of various factors on the microstructure and comprehensive properties of alloys with different compositions was obtained. With the decrease of RE/Zn atomic ratio, the W phase gradually dominates, which ensures the high thermal conductivity throughout the preparation process. Additionally, the thickness reduction per pass plays a decisive role in the properties of alloys by affecting the precipitates, dislocations and grains. The reheating between passes plays a coordinating role in the whole rolling process through the twin-induced static recrystallization mechanism. The findings indicate that leveraging the advantages of large thickness reduction per pass and effectively coordinating strain accumulation is a viable strategy for progressively enhancing the strength of high-thermal-conductivity magnesium alloys, ultimately leading to superior comprehensive performance. This study provides systematic research results for the composition design and process optimization of high-strength and high-thermal-conductivity magnesium alloy rolled sheets, which is helpful to promote the performance breakthrough and application expansion in this field.}
}