Analysis of the creep and long-term strength of VT6 titanium alloy with preliminarily injected hydrogen |
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| Authors: | A M Lokoshchenko A A Il’in A M Mamonov V V Nazarov |
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| Affiliation: | (1) Scientific-Research Institute of Mechanics, Lomonosov Moscow State University, Moscow, Russia;(2) Tsiolkovskii “MATI” Russian State Technological University, Moscow, Russia |
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| Abstract: | We describe the results of experimental and theoretical investigation of the influence of the concentration of preliminarily
injected hydrogen on the creep and long-term strength of VT6 titanium alloy under the action of tensile stresses equal to
47–217 MPa. The tests carried out at a temperature of 600°C show that hydrogen (up to 0.3 wt.%) strongly decreases the steady-state
creep rate of this alloy, increases the time to fracture, and lowers (severalfold) its ultimate fracture strain. The obtained
results are interpreted on the basis of the analysis of changes in the structural state of the alloy. The proposed version
of the kinetic theory of creep gives good agreement between the experimental and theoretical values of the principal characteristics
of creep and long-term strength.
Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 44, No. 5, pp. 98–104, September–October, 2008. |
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