Texture strengthening of titanium alloys
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Increasing the degree of deformation in cold and warm rolling increases the texture of α alloy VT5-1.
With increasing deformation of α+β alloy VT14 the quantity of basal texture, changes, reaching a peak at 70% deformation.
For α alloy VT5-1, σ b bi /σb is equal to 1.45, while it is 1.15 for α+β alloy VT14 and 1.13 for β alloy VT15.
Heating to 1000–1100° in the β region weakens the basal texture of titanium alloys, leading to pyramidal and prismatic orientations. Heating in the α or α+β regions slightly reduces the intensity of the basal texture (by 10–15%). Heating to 880° for quenching leads to a greater reduction of the deformation texture than annealing at 750°.
The decomposition of the original β phase during aging of alloy VT14 changes the texture of the precipitated α phase to prismatic, which facilitates deformation through the thickness of the plate and lowers the strengthening factor to 0.8.
Rolling after heating to 800° with small deformation in each pass and changing the direction of deformation by 45° in each pass ensures a larger percentage of the basal texture in alloy VT14 than rolling without changing the direction, with larger deformation in each pass at the same total deformation.
KeywordsTitanium Titanium Alloy Large Percentage Great Reduction Large Deformation
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