Formation of microstructure and the superplasticity of Al–Mg-based alloys

The influence of a 3–10% content of magnesium in Al–Mg–Mn(Cr) alloys on the characteristics of the microstructure of sheet blanks and their superplasticity has been examined. It has been shown that the minimum size of grains and the best superplasticity are characteristic of the alloy that contains...

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Bibliographic Details
Published in:Physics of metals and metallography 2017, Vol.118 (1), p.96-103
Main Authors: Kishchik, A. A., Mikhaylovskaya, A. V., Levchenko, V. S., Portnoy, V. K.
Format: Article
Language:English
Subjects:
Alloying additive
Alloys
Aluminum (Metal)
Aluminum base alloys
Blanks
Chemistry and Materials Science
Chromium (Metal)
Formations
Grain structure
Magnesium
Materials Science
Metallic Materials
Microstructure
Specialty metals industry
Strength and Plasticity
Superplasticity
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Summary:The influence of a 3–10% content of magnesium in Al–Mg–Mn(Cr) alloys on the characteristics of the microstructure of sheet blanks and their superplasticity has been examined. It has been shown that the minimum size of grains and the best superplasticity are characteristic of the alloy that contains about 7% magnesium and is additionally alloyed simultaneously with manganese and chromium. An increase in the content of magnesium leads to the formation of conglomerates of particles of a chromium–manganese phase and, as a result, to a coarsening of the grain structure and a deterioration of superplasticity.
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X16120085