Use of non-linear microstructure evolution to minimise radiation-induced damage Online publication date: Sat, 12-Jul-2014
by Pavlo Selyshchev
International Journal of Systems, Control and Communications (IJSCC), Vol. 5, No. 3/4, 2013
Abstract: It is considered evolution of voids in materials under irradiation as example of an open, non-linear system that is far away from thermal equilibrium. The exhaustive research of the dynamics of this system is carried out via the Poincare formalism. Due to non-linear feedback loops, there are three qualitatively different ways of evolution of voids in framework of the present model. Values of the void radius and defect density can monotonously or not monotonously decrease, tend to a stationary value and perform self-oscillation depending on the parameters of the model and the initial states. Obtained results can be used to restrict the void growth in the irradiated materials by means of creation necessary initial state, for instance by means of preliminary irradiation or cooling, proceeding from irradiation conditions. The measurement of the self-oscillations frequency gives the precision method for a control of the material properties under irradiation to avoid accidents in nuclear power.
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