Abstract
The strengthening effect of precipitates on the operation of basal < a > slip in Mg-10Dy-0.7La has been studied. Micropillar compression was performed on grains of solution-treated and peak-aged specimens selected to favour basal < a > slip. The CRSS of basal < a > slip was calculated from the stress–strain curves. The peak-aged alloy showed a remarkable increase in the CRSS for basal < a > slip as compared to that of solution-treated specimen: the highest reported increase for any Mg-RE alloy. Increased CRSS can be rationalised by considering network of precipitates.
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