Manifestation of low-temperature superplasticity in nanostructured aluminum alloys

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Abstract

The presented paper gives an overview of nanostructured state formation accompanied by the decomposition of supersaturated solid solution with forming the Zn, Mg, Cu segregations and secondary phases in alloys of Al–Zn, Al–Zn–Mg, Al–Mg–Mn, Al–Mg–Si and Al–Cu–Mg systems to achieve the effect of low-temperature superplasticity.

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About the authors

E. V. Bobruk

Ufa University of Science and Technology

Author for correspondence.
Email: e-bobruk@yandex.ru
ORCID iD: 0000-0001-8226-9887

Cand. of Sci. (Tech), Leading Researcher, Docent

Russian Federation, Ufa

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Supplementary files

Supplementary Files
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2. Fig.1. Microstructure of the Al-Zn alloy in the NS state (STEM image), red arrows indicate Zn particles in triple junctions (a); enlarged image indicating the Zn layer along the grain boundary and inside the Al grains (b) [9]

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3. Fig.2. Microstructure of the Al-4.8Zn-1.2Mg-0.14Zr alloy in the NS state: TEM image, bright field with electron diffraction pattern (a); STEM image, dark-field (b) [11, 12]

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4. Fig.3. Microstructure of the Al-Mg-Mn alloy in the NS state: TEM image, bright field with electron diffraction pattern (a); dark field TEM image (b) (in (b) the arrows indicate nanosized particles of secondary phases) [13]

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5. Fig.4. Microstructure of the NS Al-0,60Mg-0.60Si-0,10Cu-0,10Mn-0,15Zn-0,50Cr alloy: TEM image bright field (a); (111) pole figures produced by (b) HPT and after subsequent SP deformation at 150 °C (с) [15]

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6. Fig.5. Microstructure of the Al-4,98Cu-1,49Mg-0,73Mn-0,04Si-0,07Fe alloy in the NS state: TEM image with electron diffraction pattern (a); STEM image with an insert of EDS analysis of the grain boundary (b) [16, 17]

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7. Fig.6. Map of temperature-strain rate conditions for the manifestation of LTSP in NS alloys of the Al–Zn, Al–Zn–Mg, Al–Mg–Mn, Al–Mg–Si, Al–Cu–Mg systems Mg with various main alloying elements (Zn, Zn/Mg, Mg, Cu)

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