Abstract
The work brings the results of the study of mechanisms of deformation in Cu-6 wt% Al, low stacking fault energy single crystals. It was observed that deformation up to 180% of elongation in tension proceeds in three distinct stages, all having a linear representation in the stress-strain curve. Particular attention was paid to an inhomogeneous transient from the second to third stage and to the mechanisms of deformation in both stages. It has been found that a sudden decrease of the strain hardening rate in the third stage is associated with activation of a new slip system. Based upon the experimental results the model for a strain softening process is suggested.
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