Influence of hydrogen on the transformations in titanium alloys
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The addition of hydrogen to the alloys lowers the temperature of the transition from the α+β-to the β-region.
During isothermal treatment hydrogen basically accelerates the decomposition of the martensitic α′-phase and retards the decomposition of the β-phase.
In alloys with a subcritical structure hydrogen increases the quantity of the ω-phase formed on quenching.
Acting as a β-stabilizer, hydrogen draws the structure of the subcritical alloy toward the critical structure and increases the quantity of the residual β-phase formed on quenching of the alloy.
In alloys of supercritical structure hydrogen reduces the quantity of the ω-phase and lowers the maximum temperature at which it is formed.
Aging has the greatest effect on the alloys quenched from the temperature at which the β-phase is near the critical structure.
Hydrogen increases the effect of aging on alloys quenched from the α+β-region.
Increasing hydrogen concentrations reduce the quenching temperature of α+β-alloys and provide the maximum effect of aging.
KeywordsHydrogen Titanium Titanium Alloy Hydrogen Concentration Maximum Effect
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- 1.L.P. Luzhnikov, V.M. Novikova, A.P. Mareev, and I.S. Orlova, MiTOM, No. 5 (1965).Google Scholar