BCC-Based Mg–Li Alloy with Nano-Precipitated MgZn2 Phase Prepared by Multidirectional Cryogenic Rolling

In this study, we deformed the single β phase Mg–Li alloy, Mg–16Li–4Zn–1Er (LZE1641), with conventional rolling (R) and multi-directional (MDR), both at cryogenic temperature. Results showed that nano-precipitation MgZn2 appeared in alloy after MDR, but phenomenon was not present R. The finite element simulation result different deformation modes changed stress distribution inside which affected microstructures motion law of solute atoms. high-density dispersively distributed particles a size about 35 nm were able to significantly inhibit grain boundary migration. They further hindered dislocation movement consolidated strengthening fine-grain effects. Compared compressive strength R (273 MPa), improved by 21% MDR (331 MPa). After 100 °C compression, remained stable.