Modeling of the process of superplastic forming of hemispherical shells from blanks of different profiles

Murzina, Guzel; Ganieva, V. R.; Kruglov, A. A.; Enikeev, F. U.

doi:10.22226/2410-3535-2021-4-548-552

Cited by 3 publications

(1 citation statement)

References 18 publications

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“…For both alloys, with the initial thickness of preform S 0 =1 mm, the thickness of the hemisphere at the edge of the fixing zone (the area with the lowest strain) was S max = 0.78 -0.79 mm, and the thickness at the pole of the hemisphere (the area with the largest strain) was S min = 0.27 -0.29 mm, which is quite typical for the SPF of hemispheres with a constant pressure and rigid clamping of the flange of the sheet preform [13]. For industrial SPF processes, special techniques are used to minimize the variation in thickness [14], but this task is out of the scope of the present work.…”

Section: Resultsmentioning

confidence: 99%

Superplastic forming of titanium alloys at 700°C

et al. 2022

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The formability of the novel Ti-1.5Al-1.5V-2.75Fe-3.0Mo-0.25Ni-0.1B alloy and the commercial Ti-6Al-4V alloy at 700°С was evaluated in the present study. Experiments have demonstrated the possibility of superplastic forming of both alloys with a fine-grained microstructure at 700°C and a constant argon gas pressure p = 2 MPa. However, the forming time for the novel alloy was only a few minutes (τ = 235 s), while for the Ti-6Al-4V it amounted almost 2.5 hours (τ = 8700 s). The better formability of the novel alloy at 700°С compared to the commercial one is in good agreement with the results of computer simulations performed earlier and is mainly due to an increased content of the β phase. Microstructural analysis showed that low-temperature superplastic forming was accompanied by the development of spheroidization and recrystallization processes. It is important that recrystallization did not lead to a significant grain growth and provided an increase in the structure homogeneity and randomization of the rolling texture. The most significant improvement of microstructure homogeneity after forming at 700°C was observed in the Ti-6Al-4V alloy with the initial partially recrystallized structure.

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Section: Resultsmentioning

confidence: 99%