Superplasticity and solid-phase bonding of nanostructured materials Part I. The effect of grain size on the solid-phase weldability of superplastic alloys

R.Ya. Lutfullin1
1Institute for Metals Superplasticity Problems RAS, Khalturin St. 39, 450001 Ufa, Russia
Abstract
 The manuscript presents a chronological review of studies dealing with the influence of the effect of superplasticity (SP) on improved solid state weldability of crystalline materials. On the basis of the analysis of the results of research works mainly made at the Institute for Metals Superplasticity Problems (IMSP) it has been shown that nanostructured processing provides decreasing the temperature of superplasticity of known materials by 200-300oC that confirms the effect of low temperature superplasticity. The study of the results of experimental studies indicates the existence of direct correlation between the low temperature SP and solid state weldability of crystalline materials. The manuscript considers a model of solid state joining under conditions of low temperature superplasticity for nanocrystalline titanium alloy VT6. The data of physical modeling of the process of solid state joining under low temperature SP conditions provide scientific basis for substantiation of practical implementation of nanostructured materials at air craft industry enterprises for developing advanced resource-saving technologies for producing hollow components by pressure welding.
Accepted: 21 April 2011
Views: 273   Downloads: 167
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