fig18

Figure 18. (A) Stress-strain curves of $$ {<}1 1 \overline{2} 0{>} $$ columnar grain system of HCP Zn, Mg, and Be, respectively, at the strain rate of 1 × 10¹⁰ s^-1 and (B) the change of <a> dislocation percentage during tension, where the basal <a> dislocation atoms are identified by stacking fault structure. HCP: Hexagonal close-packed.