thinning of the layers depends on the coefficient of mechanical heterogeneity of metals.
It is shown that the main obtained regularities of deformation qualitatively and
quantitatively with a sufficient degree of accuracy coincide with the results of the
calculation of two-layer billets with other mechanical properties, for example, systems
aluminum + titanium, aluminum + brass, aluminum + stainless steel and others
5. Based on the analysis of the stress-strain state and the kinematic interaction, it
is found that conditions are created in the deformation zone of the layers that contribute
to the diffusion connection of the layers:
- maximum compressive stress on the limiting surface of the layers reaches the
boundary of the metal layer flow with less mechanical properties;
- the difference between the axial deformations of the layers, as well as the
presence of shear deformations in the interaction of layers on the limiting surface
provide the destruction of oxide films, which contributes to the interaction of layers;
- in the zone close to the exit of the matrix, the difference between the movement
of the material layers on the limiting surface is reduced to zero;
- the presence of heating layers to the activation temperature contributes to their
interaction.
6. The main scientific results obtained by analytical and numerical calculations
are experimentally confirmed. It is shown that the maximum error of calculation of
power parameters does not exceed 7...10%, the advance of the layer with a lower yield
strength does not exceed 9...11%, the deformation layer thickness after pulling with
thinning does not exceed 10...14% for the different coefficients of mechanical
anisotropy of metals.
In experimental conditions typical BTE were obtained, metallographic analysis of
which showed the interaction of layers. Evaluation of the strength of the layers showed
that it reaches 80...85% of the shear stress for the alloy with lower yield stress.
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