Superplastic-Like Behaviour of Coarse-Grained Single Phase Aluminium Alloys

Nikiforov, A. O.; Левченко, В. С.; Novikov, I. I.; Portnoy, V.K.

doi:10.4028/www.scientific.net/msf.170-172.71

Cited by 7 publications

(1 citation statement)

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“…Dislocations formed dislocation walls through slip and climbing, and thus the elongated grains were divided. In addition, fine recrystallized grains were observed at the intersection of grain boundaries, which indicated that dynamic recrystallization occurred during superplastic deformation (the same phenomenon was also observed in [28][29][30]). However, both transmission photographs and surface studies showed that the dislocations played a very limited role in the deformation process, so there remains the question of how these recrystallized grains were produced under the conditions of weak dislocations.…”

Section: Discussionsupporting

confidence: 55%

Superplastic Deformation Mechanisms in Fine-Grained 2050 Al-Cu-Li Alloys

Liu

Sun

et al. 2020

Materials

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The deformation behavior and microstructural evolution of fine-grained 2050 alloys at elevated temperatures and slow strain rates were investigated. The results showed that significant dynamic anisotropic grain growth occurred at the primary stage of deformation. Insignificant dislocation activity, particle-free zones, and the complete progress of grain neighbor switching based on diffusion creep were observed during superplastic deformation. Quantitative calculation showed that diffusion creep was the dominant mechanism in the superplastic deformation process, and that grain boundary sliding was involved as a coordination mechanism. Surface studies indicated that the diffusional transport of materials was accomplished mostly through the grain boundary, and that the effect of the bulk diffusion was not significant.

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Section: Discussionsupporting

confidence: 55%