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Preface
The Effect of Processing under Low-Temperature Superplasticity on Structure and Mechanical Properties of Ultrafine-Grained near Beta Titanium Alloy
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The Effect of Processing under Low-Temperature Superplasticity on Structure and Mechanical Properties of Ultrafine-Grained near Beta Titanium Alloy

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Abstract:

The influence of low-temperature superplastic deformation on the structure and room temperature mechanical properties of ultrafine-grained titanium alloy Ti-55511 was investigated. It was shown that superplastic deformation by compression of the alloy at a strain rate of ~10-2 s-1 at a temperature of 823 K (0.42 Tm) leads to an insignificant growth in the elements of the UFG grain-subgrain structure with a slight decrease in the strength value compared to the initial state formed by the all-round pressing method. Additional annealing of samples at a temperature of 723 K for 5 hours after SP compression leads to an increase in mechanical properties to the level of the initial UFG alloy. It was found that preservation of high mechanical (strength) properties of the UFG Ti-55511 alloy after compression deformation can also be ensured by reducing the temperature of the superplastic deformation treatment up to 803 K.

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Periodical:

Diffusion Foundations and Materials Applications (Volume 39)

Pages:

3-9

DOI:

https://doi.org/10.4028/p-szL1pp

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Online since:

January 2026

Authors:

Evgeniy V. Naydenkin*, Il'ya Ratochka, Olga Lykova, Ivan P. Mishin

Keywords:

All-Round Pressing, High Strength, Low-Temperature Superplasticity, Mechanical Properties, Near β Titanium Alloy, Ultrafine-Grained Structure

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