The development of grain boundary porosity is investigated at creep of coarse‐grained alloys Al‐4 wt % Ge which show superplastic behaviour in the solid solution temperature range. Under optimum conditions of superplasticity (T = 500°C, σ = 3 MN/m2) strain occurs with porosity whose level remains constant throughout creep. Under the conditions different from the optimum ones, in the process of testing the porosity volume rises to failure. The development of porosity under the conditions of superplasticity is described and a conclusion is drawn on an important role of grain boundary porosity in the process of grain boundary sliding which is the leading strain process of superplastic flow. It is demonstrated that superplastic deformation does not necessarily require retaining the material solidity as it is usually assumed in superplastic flow models.
The most widespread digital services have been studied in addition to their effectiveness for the development of training materials that provide educational opportunities of distance learning in terms of the implementation of remote access to learning. The significance of the implementation of distance remote learning for future teachers training at universities is determined. The results of the study prove the necessity to develop educational and methodological materials for the implementation of new form of training in NEFU, RSPU and CSU.
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