PRODUCTION OF HIGHSTRENGTH TITANIC STRIPS BY CONSOLIDATION OF POWDER USING TECHNOLOGY OF ASYMMETRICAL ROLLING
The results of mechanical tests of titanium strips obtained by rolling of a powder are reported. The obtained data demonstrate the advantage of asymmetric rolling as compared to the symmetric one. It is found that after asymmetric rolling, the «green» strength of the strips is 5 times higher. After the sintering, the mechanical properties of powder strips are comparable with those obtained by rolling of compacts. Additional rolling by using of an asymmetric scheme gives an opportunity to obtain deformed tapes characterized by strength and ductility exceeding those of similar tapes obtained by the conventional technology. The role of shear deformation in the formation of contacts in the products of powder genesis is analyzed. The advantages and disadvantages of asymmetric rolling are discussed. The place of this scheme in general methodology of severe plastic deformation is determined.