@article{Fan2025, 
author = {Mingyu Fan and Ye Cui and Xin Zhou and Junming Chen and Yang Zhang and Lixin Sun and Jamieson Brechtl and Daqing Fang and Qian Li and Qingqing Ding and Hongbin Bei and Peter K. Liaw and Yanzhuo Xue and Xun-Li Wang and Yang Lu and Zhongwu Zhang},
title = {Enhancing strength at elevated temperatures via dynamic high-density mobile dislocations in Mg alloys},
year = {2025},
journal = {Journal of Magnesium and Alloys},
volume = {13},
number = {8},
pages = {3768-3783},
keywords = {Mg-Y-Zn alloy, Ho addition, High-density mobile dislocations, Dynamic strain aging (DSA), Elevated-temperature strength},
url = {https://www.sciopen.com/article/10.1016/j.jma.2025.03.004},
doi = {10.1016/j.jma.2025.03.004},
abstract = {Dislocation strengthening, as one of the methods to simultaneously enhance the room temperature strength and ductility of alloys, does not achieve the desired strengthening and plasticity effect during elevated-temperature deformation. Here, we report a novel strategy to boost the dislocation multiplication and accumulation during deformation at elevated temperatures through dynamic strain aging (DSA). With the introduction of the rare-earth element Ho in Mg-Y-Zn alloy, Ho atoms diffuse toward dislocations during deformation at elevated temperatures, provoking the DSA effect, which increases the dislocation density significantly via the interactions of mobile dislocations and Ho atoms. The resulting alloy achieves a great enhancement of dislocation hardening and obtains the dual benefits of high strength and good ductility simultaneously at high homologous temperatures. The present work provides an effective strategy to enhancing the strength and ductility for elevated-temperature materials.}
}