@article{Ni2025, 
author = {Ran Ni and Huashen Liu and Shen Hua and Hao Zhou and Ying Zeng and Dongdi Yin},
title = {Statistical investigation on the tension-compression asymmetry of slip behavior and plastic heterogeneity in an aged Mg-10Y sheet},
year = {2025},
journal = {Journal of Magnesium and Alloys},
volume = {13},
number = {8},
pages = {3880-3895},
keywords = {Mg alloy, Slip behavior, Tension-compression asymmetry, Pyramidal slip, GND density},
url = {https://www.sciopen.com/article/10.1016/j.jma.2024.11.033},
doi = {10.1016/j.jma.2024.11.033},
abstract = {The grain-scale tension-compression (T-C) asymmetric slip behavior and geometrically necessary dislocation (GND) density in an aged and twin-free Mg-10Y sheet were statistically studied using slip trace analysis and electron backscatter diffraction (EBSD) analysis. A significantly asymmetric slip activity, i.e., higher tensile slip activity and proportion of non-basal slip, was manifested. Prismatic 〈a〉 (37.1%) and basal 〈a〉 (27.6%) slips dominated the tensile deformation, followed by pyramidal Ⅱ 〈c + a〉 slip (20.0%). While during compression, basal 〈a〉 slip (61.9%) was the most active slip mode, and only 6.9% pyramidal Ⅱ 〈c + a〉 slip was observed. The critical resolved shear stress (CRSS) ratio was estimated based on ~800 sets of the identified slip traces, which suggested that the CRSSpyr Ⅱ/CRSSbas for compression was ~3 times than that of tension. The pyramidal Ⅱ 〈c + a〉 slip was more active when the slip plane was under tension than under compression, which was consistent with the calculated asymmetric CRSSpyr Ⅱ/CRSSbas. The activity of multiple slip, cross slip and slip transfer, as well as the GND density were also T-C asymmetric. This work thoughtfully demonstrated the T-C asymmetric slip behavior and plastic heterogeneity in Mg alloys which was believed to be responsible for the macroscopic T-C asymmetry when twinning was absent. The present statistical results are valuable for validating and/or facilitating crystal plasticity simulations.}
}