On the Dynamic Superplasticity

Abstract:

Superplasticity is considered as a special state of the polycrystalline material plastically deformed at the low level of the stress with the retaining of the ultrafine-grained structure – structural superplasticity received at the previous stage or arised during hot deformation independently from the initial grain size – dynamic superplasticity. For realization of the dynamic superplasticity it has to substitute an initial structural condition of material another, allowed to realize a superplasticity. The mentioned above changes are caused by the conforms of the proper strain rates and structural (phase) transformations of the evolutionary type in the open nonequilibrium systems. It is proposed an approach applying to the modelling of the deformation processes at the superplastic flow of commercial aluminum alloys taking into account the boundary regions in the framework the theory of self-organization of dissipative structures. An examples of the theoretical and experimental data correlation are given.

• Periodical: Materials Science Forum (Volume 879)
• Pages: 960-965
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.879.960
• Online since: November 2016
• Authors: Daria A. Kitaeva*, G.E. Kodzhaspirov, Yakov I. Rudaev
• Keywords: Aluminum Alloy, Dynamic Recrystallization, Dynamic Superplasticity, Open Nonequilibrium Systems, Phase Transformations

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