Stanford, N.Barnett, M.R.2025-12-172025-12-172013International journal of plasticity, 2013; 47:165-1810749-6419https://hdl.handle.net/11541.2/129065Mg-Zn binary alloys with concentrations between 0 and 2.8 wt% Zn have been prepared and processed via hot rolling and annealing to produce specimens with a strong basal texture and a range of grain sizes. These have been deformed in three different strain paths: tension, compression and shear, in order to promote the dominance of prismatic slip, {101̄2} twinning and basal slip, respectively. This experimental data has been used to create Hall-Petch plots for each deformation mode. It has been found that the prismatic slip system has a plateau in its Hall-Petch plot above grain sizes of ∼30 μm, and solute softening of the prismatic system was found to be operative only at grain sizes above ∼50 μm. In compression, the stress required to activate twinning was found to be insensitive to Zn concentration. It is proposed that solute softening and anomalous Hall-Petch behaviour of prismatic slip be understood in terms of the dominance of the cross-slip stress in coarse grained materials. The effect of grain size on the relative strength of basal slip, prismatic slip and {101̄2} twinning is also discussed.enCopyright 2013 Elseviermagnesiumdeformationsliptwinningsolute strengtheningJournal article10.1016/j.ijplas.2013.01.0122-s2.0-84879084518Stanford, N. [0000-0002-2578-9795] [0000-0002-3298-4249]