| Abstract Scope |
Two quaternary Mg alloys, ZXK210 and ZXK310, contain 2 and 3 wt% Zn, respectively, along with small additions of 0.5 wt% Ca and 0.4 wt% Zr. Recent research has highlighted strengthening of GP zones which form in the solution heat treated, quenched, and artificially aged alloys. The current study shows that even greater strength can be observed in as-rolled material without any subsequent heat treatment, with little decrement in ductility. The sources of this strength are a slightly stronger crystallographic texture than that which develops after solution heat treatment, a high dislocation density from warm rolling, and a rather fine distribution of globular Zn-Zr precipitates. The plastic response of the sheet material can be described using an elasto-viscoplastic self-consistent (EVPSC) polycrystal plasticity model, allowing the level of prior warm deformation to be optimized to achieve the desired property combination. |