Pressure Welding of bulk samples out nanostructured titanium alloy Ti-6Al-4V in the State of Low Temperature Superplasticity

M.K. Mukhametrakhimov1
1ИПСМ РАН, г. Уфа, ул. Ст. Халтурина -39
The paper considers the possibility to decrease the temperature of pressure welding of nanostructured titanium alloy Ti-6Al-4V to the temperature 600оС 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 0.3 μm under conditions when deformation processes play a leading role in formation of a solid state joint. 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.
Received: 04 July 2012   Revised: 02 October 2012   Accepted: 15 October 2012
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