 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 12804 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8044
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| In English (Mech. Solids): | | 4760 |
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| I.V. Vlasov, V.Ye. Yegorushkin, V.Ye. Panin, A.V. Panin, and O.B. Perevalova, "Fractography, Fracture Toughness and Structural Turbulence Under Low-Temperature Shock Loading of a Nonequilibrium Titanium Alloy Ti-6Al-4V," Mech. Solids. 55 (5), 633-642 (2020) |
| Year |
2020 |
Volume |
55 |
Number |
5 |
Pages |
633-642 |
| DOI |
10.3103/S0025654420050155 |
| Title |
Fractography, Fracture Toughness and Structural Turbulence Under Low-Temperature Shock Loading of a Nonequilibrium Titanium Alloy Ti-6Al-4V |
| Author(s) |
I.V. Vlasov (Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, Tomsk, 634055 Russia)
V.Ye. Yegorushkin (Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, Tomsk, 634055 Russia)
V.Ye. Panin (Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, Tomsk, 634055 Russia; National Research Tomsk Polytechnic University, Tomsk, 634050 Russia; National Research Tomsk State University, Tomsk, 634050 Russia, viv@ispms.tsc.ru)
A.V. Panin (Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, Tomsk, 634055 Russia; National Research Tomsk Polytechnic University, Tomsk, 634050 Russia)
O.B. Perevalova (Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences, Tomsk, 634055 Russia) |
| Abstract |
The titanium alloy Ti-6Al-4V with strongly nonequilibrium α- and β-phases has been
studied for the first time. For this, it was subjected to cross-helical rolling (CHR) at T=1000°C (above the polymorphic transformation temperature), and then quenched in water in order to partially preserve vanadium in the α-phase, and aluminum in the β-phase. Under active uniaxial tension, the nonequilibrium VT6 alloy was deformed in the absence of strain hardening at room temperature. Alloys treated with CHR below the polymorphic transformation temperature showed traditional parabolic hardening. The non-equilibrium of the VT6 alloy caused a strong increase in its impact toughness at low temperatures down to T=−70°C. The fatigue life of a nonequilibrium alloy has doubled. If the initial alloy has ductile-brittle fracture at low negative temperatures, then the nonequilibrium alloy deforms viscously with all signs of structural turbulence. Structural turbulence in a nonequilibrium alloy manifests itself in the temperature range from 20 to -70°C, during deformation of 3D-printed samples, under conditions of shock separation of diffusion-sintered multilayer VT6 alloy packets. |
| Keywords |
Ti-6Al-4V alloy, nonequilibrium α and β phases, low-temperature impact toughness, fatigue life, structural turbulence |
| Received |
20 February 2020 | Revised |
27 March 2020 | Accepted |
04 April 2020 |
| Link to Fulltext |
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