@article{Hu2025, 
author = {Zhangting Hu and Yipeng Gao and Yizhen Li and Zhen-Ming Hua and Chunfeng Du and Min Zha and Hui-Yuan Wang},
title = {Enhanced plasticity mediated by disclination-assisted accommodation and twinning-induced work hardening in an elliptical-textured Mg alloy},
year = {2025},
journal = {Journal of Magnesium and Alloys},
volume = {13},
number = {10},
pages = {4825-4842},
keywords = {Disclination, Texture, Plastic deformation, Microstructure, Disclination-assisted accommodation},
url = {https://www.sciopen.com/article/10.1016/j.jma.2025.01.010},
doi = {10.1016/j.jma.2025.01.010},
abstract = {Crystallographic texture engineering is a key strategy for enhancing the mechanical properties of polycrystalline magnesium (Mg) alloys. Due to the intrinsic anisotropy of the hexagonal close-packed (HCP) structure, the deformation behavior of Mg alloys is significantly governed by individual grain deformation and multi-grain interactions, both dictated by crystallographic texture. In the current study, enhanced ductility was achieved in a Mg-Al-Zn-Mn dilute alloy by tailoring a strong basal texture into a transverse-direction-spread elliptical texture through the minor addition of yttrium (Y). Systematic quasi-in-situ electron backscatter diffraction (EBSD) and dislocation/disclination density analyses were performed to examine the microstructural evolution during deformation. We found that disclinations emerge from defect reactions, including dislocation-grain boundary (GB) and twin-GB interactions, which facilitate twinning plasticity and intergranular accommodation in the elliptical-textured alloy, resulting in improved work-hardening capacity and higher ductility (28.5% along the rolling direction and 32.2% along the transverse direction). By introducing disclination analysis to elucidate defect reactions, multi-grain interactions and the associated microstructure-property relationships in polycrystalline metals, our work provides new insights into the design of advanced Mg alloys with enhanced ductility and formability through crystallographic texture engineering.}
}