PRODUCTION AND TECHNOLOGICAL PLASTICITY OF COMMERCIALLY PURE TITANIUM IN THE SUBMICROCRYSTALLINE STATE
Vladimir I. Danilov, Lev B. Zuev, Galina V. Shlyakhova, Dina V. Orlova, Yuri P. Sharkeev
Strony: 4-14
Opublikowano: 1 Jan 2010
Wyświetlenia: 108
Streszczenie: Presented is the method for producing solid billets of commercially pure titanium having lowdimensional nanostructure (structural elements ≤ 100 nm). The method is based on multiple unidirectional pressing, with the direction of pressing being changed every other cycle, followed by cold rolling. The microstructure, mechanical characteristics and plastic deformation behavior of material produced by the above method was investigated. The results obtained are presented herein. The loading diagram of titanium alloy in nanostructure state shows a lengthy prefracture portion, which suggests that material undergoes practically no deformation hardening. The latter stage is also distinguished by the emergence of macroscopic nuclei of localized plastic flow, which differ in the level of accumulated deformation. The maximal-amplitude nucleus will remain stationary, pinpointing the place of future fracture. On the meso-scale level formation of meso-bands (folds) is observed, with the distribution and characteristic sizes of the meso-bands corresponding to the arrangement of localized plastic flow macro-nuclei. Characteristically, the local and global loss of plastic flow stability will occur simultaneously in titanium alloy in nanostructure state. On the base of experimental evidence certain modifications can be introduced into the pressing schedules employed by the production of materials in nanostructure state.
Słowa kluczowe: titanium, nanostructure state, method of severe plastic deformation, deformation behavior, localized plastic flow, fracture
Cytowanie artykułu: Vladimir I. Danilov, Lev B. Zuev, Galina V. Shlyakhova, Dina V. Orlova, Yuri P. Sharkeev. PRODUCTION AND TECHNOLOGICAL PLASTICITY OF COMMERCIALLY PURE TITANIUM IN THE SUBMICROCRYSTALLINE STATE. Journal of International Scientific Publications: Materials, Methods & Technologies 4, 4-14 (2010). https://www.scientific-publications.net/en/article/1003446/
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