| The paper considers the possibility to decrease the temperature of pressure welding of submicrocrystalline titanium alloy VT6 to the temperature 600 œó to process sound welded joint. The aim is attained by using the effect of low temperature superplasticity in the alloy with a mean grain size no more than 0.2 µm under conditions when deformation processes play a leading role in formation of a solid state joint. The paper applies the ability to localization of plastic flow. The special shaping of the sample having a zone with a less cross section area provides steady localization of plastic flow directly in the zone of joining and promotes a flow of a material under condition most favorable in terms of deformation energy (load, force), thus it optimizes consumption of deformation energy. The results of FEM-code analysis of the stress-strain state of various shape samples are given. |
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