@article{Ning2026, 
author = {Tingting Ning and Pengbo Yang and Xuan Luo and Xiangxiang He and Xianneng Wang and Yao Cheng and Xinde Huang and Yunchang Xin},
title = {Fabrication of high-density twins and precipitates in a rare-earth magnesium alloy with superior work hardening and ultimate strength},
year = {2026},
journal = {Journal of Magnesium and Alloys},
volume = {16},
number = {C},
keywords = {Microstructure, Precipitation, Work-hardening, WE43, Deformation twin},
url = {https://www.sciopen.com/article/10.1016/j.jma.2025.10.006},
doi = {10.1016/j.jma.2025.10.006},
abstract = {Grain refinement and precipitation are conventionally employed to enhance the mechanical properties of magnesium alloys. However, there remains a challenge in obtaining a fine grain structure together with a high-density precipitates, particularly in rare-earth containing magnesium alloys. In this study, a strong and ductile Mg-RE (WE43) alloy featuring a fine twin structure and dense nano-precipitates was fabricated via a processing combining multi-directional compression with multi-intermediate aging. The mechanical characterization demonstrated that the fabricated WE43 alloy exhibits an exceptional work-hardening capacity and enhanced ultimate tensile strength, albeit with some compromise in yield strength. Microstructural investigations reveal that the multi-directional compression promotes extensive grain refinement through the formation of nanostructured deformation twins, while the multi-intermediate aging inhibits twin expansion via solutes and precipitates pinning along twin boundaries. Further transmission electron microscopy analysis revealed the formation of high-density nano-precipitates within the matrix. The fine twins and dense precipitation structure strongly promote dislocation multiplication and accumulation, by interaction among dislocations, twin boundaries and nano-precipitates, leading to the significantly improved work-hardening capability and ultimate strength. The current study presents a new approach for the fabrication of rare-earth containing magnesium alloys with high ductility and ultimate strength.}
}