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M. M. MYSHLYAYEV, M. M. KULAK, and E. G. PASHINSKAYA
«Formation of Nanostucture Superplastic State in Aluminium Based Alloys»
PACS numbers: 61.72.Ff, 61.72.Hh, 61.72.Mm, 62.20.fq, 62.23.St, 81.40.Lm, 83.50.-v
Features of mechanical and structural behaviour of aluminium-based alloy during the superplastic-flow process are studied. As revealed, the stationary superplastic-flow deformation is realized at the structural state in the bulk of material, to which the dynamic stationarity of characteristics of structure elements corresponds. As shown, at the stage of ‘hardening’, the superplastic flow is realized due to dislocation slip within the grains, while, at the ‘softening’ stage, it is implemented by the mechanism of grain-boundary slip.