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HomeMaterials Science ForumMaterials Science Forum Vols. 838-839Superplastic Deformation Mechanisms in High...

Superplastic Deformation Mechanisms in High Magnesium Contenting Aluminum Alloy

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Abstract:

The evolution of surface, grains and dislocation structures during superplastic deformation was studied in Al–6.8%Mg–0.6%Mn–0.25%Cr alloy by SEM, EBSD, TEM techniques. The effective activation energy of superplastic deformation was calculated. Contribution of grain boundary sliding was defined during superplastic deformation. Low value of grain boundary sliding, significant dynamic grain growth in stress direction, high dislocations activity and permanent continuous formation of sub-grain boundaries during superplastic deformation were found.

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Periodical:

Materials Science Forum (Volumes 838-839)

Pages:

66-71

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.838-839.66

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Online since:

January 2016

Authors:

O.A. Yakovtseva, Anastasia V. Mikhaylovskaya*, A.G. Mochugovskiy, V.V. Cheverikin, Vladimir K. Portnoy

Keywords:

Grain Boundary Sliding, Grain Structure, Mechanisms of Superplastic Deformation, Superplasticity

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