TY  - JOUR
AU  - Xu, Jing
AU  - Guan, Bo
AU  - Xin, Yunchang
AU  - Huang, Guangjie
AU  - Wu, Peidong
AU  - Liu, Qing
PY  - 2024
TI  - Revealing the role of pyramidal <c+a> slip in the high ductility of Mg-Li alloy
JO  - Journal of Magnesium and Alloys
SN  - 2213-9567
SP  - 1021
EP  - 1025
VL  - 12
IS  - 3
AB  - The high ductility of Mg-Li alloy has been mainly ascribed to a high activity of pyramidal <c+a> slip to accommodate plastic strain. In the present study, however, a quantitative analysis reveals that Li-addition can only slightly stimulate the activation of pyramidal <c+a> slip under compression along the normal direction of a hot-rolled Mg-4.5 wt.% Li plate, with a relative activity of approximately 18%. Although the limited activity of pyramidal <c+a> slip alone cannot accommodate a large plastic strain, it effectively reduces the number of {1011} − {1012} double twins, which are believed to be favorable sites for crack initiation. The evidently reduced activity of double twins leads to a lower cracking tendency, and therefore improves ductility.
UR  - https://doi.org/10.1016/j.jma.2021.11.012
DO  - 10.1016/j.jma.2021.11.012