Abstract
The application of hydrostatic pressure (backpressure) during equal channel angular pressing (ECAP) of a magnesium alloy results in much enhanced grain refinement, and the splitting of the (0 0 0 2) dominant texture component from one strong peak into two weak peaks. This corresponds well with the existing texture simulation results assuming significant contribution of 〈 c + a 〉 non-basal slip. Transmission electron microscopy observation shows the prevalence of 〈 c + a 〉 dislocations and thus confirms that the deformation mechanism has been changed by the application of hydrostatic pressure during ECAP.
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