Effect of Li element on shocking behavior of Fe-Li alloys

•Large internal stresses caused by concentration of Li element effectively activated the nucleation and multiplication of dislocation loops.•Phase transition is inhibited for shock along [111] direction because of stress release caused by multiplication of dislocation with the increase of Li composition.•There is a strong dependence between microscopic processes and the law of plastic wave propagation.•the uniformity of initial stress and potential energy were destroyed with the increase of Li composition, and resulted in the suppression of phase transition variants in for shock along [110] direction.