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The structural parameters ensuring high strength and low electrical resistance have been analyzed in Cu–Cr alloys exposed to severe plastic deformation (SPD) and aging. Specific resistance and strength characteristics have been modeled for a Cu–0.5 wt % Cr alloy with a nanostructure state caused by SPD. A comparison of modeling data with experimental values reveals the validity of the approach chosen for describing the above states. The formation of nanostructure states with high strength and low electrical resistance is shown to be due to simultaneous effects depending on the treatment conditions of materials. [ABSTRACT FROM AUTHOR]

The presented work considers one of the promising ways of enhancement of strength in ultra fine-grained (UFG) metal materials produced as a result of application of severe plastic deformation techniques. Mathematical modeling showed that structure design in UFG Al and Ti alloys enabled significantly increasing their strength. By introducing impurity atoms with fixed concentration in the matrix and subjecting material to relevant processing, one can form UFG structures with a high strength including at elevated temperatures. [ABSTRACT FROM AUTHOR]

The microstructure and mechanical properties of joint welds formed by linear friction welding (LFW) in in Al-Cu-Mg alloy was investigated. Joint welds of two samples of rectangular shape do not possess any macroscopic defects and are characterized by high strength. The substantial transformation of the microstructure occurs in the weld zone as a result of plastic deformation and deformation heating during LFW. [ABSTRACT FROM AUTHOR]