Fig. 1. True stress-strain curves on M1 magnesium alloy with two different strain rate.
Fig. 2. Microstructure observation of M1 magnesium alloy before deformation.
Fig. 3. Grain structure map observed on the mid-plane (ND plane) section by EBSD measurement after deformation on the strain rate of 5.0 × 10-2 s-1 at various true strain of (a) -0.4, (b) -0.7, (c) -1.0 and (d) -1.3, respectively.
Fig. 4. Grain structure map observed on the mid-plane(ND plane) section by EBSD measurement after deformation on the strain rate of 5.0 × 10-4 s-1 at various true strain of (a) -0.4, (b) -0.7, (c) -1.0 and (d) -1.3, respectively.
Fig. 5. Effect of true strain on mean grain size at different strain rates. Open circle means annealed state.
Fig. 6. Black map obtained by EBSD measurement after deformation on the true strain of -1.0 at strain rates of (a) 5.0 × 10-2 s-1 and (b) 5.0 × 10-4 s-1, respectively.
Fig. 7. Histograms showing the distribution of grain size before deformation.
Fig. 8. Histograms showing the distribution of grain size at each strain with the strain rate of 5.0 × 10-2 s-1.
Fig. 9 Histograms showing the distribution of grain size at each strain with the strain rate of 5.0 × 10-4 s-1.
Fig. 10. Grain orientation spread (GOS) distribution according to each grain size.
Fig. 11. Line misorientation on each line at the true strain of -1.0 and strain rate of 5.0 × 10-2 s-1.
Fig. 12. Kernel Average Misorientation (KAM) based on EBSD data in each difference of strain rate at the true strain of -1.3.
Table 1. Chemical composition of the M1 magnesium alloys (wt.%)
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