Characterization of the secondary phases in spray formed Al–Zn–Mg–Cu–Sc–Zr alloy during hot compression

An Al–10.83Zn–3.39Mg–1.22Cu–0.16Zr–0.16Sc alloy was produced using the spray deposition technology. The microstructure evolution within temperature ranging between 613 K and 733 K during hot pressing process at different initial strain rate was investigated in a transmission electron microscope (TEM...

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Bibliographic Details
Published in:Journal of materials research 2016-08, Vol.31 (16), p.2465-2472
Main Authors: Ning, Z.L., Guo, S., Zhang, M.X., Cao, F.Y., Jia, Y.D., Sun, J.F.
Format: Article
Language:English
Subjects:
Alloys
ALUMINUM ALLOYS (50 TO 99 AL)
Aluminum base alloys
Analysis
Applied and Technical Physics
Biomaterials
BOUNDARIES
Chemical precipitation
COMPRESSIVE PROPERTIES
Crystallization
DEFORMATION
DEPOSITION
Dislocations
Electron microscopes
Grain boundaries
Hot pressing
Inorganic Chemistry
Materials Engineering
Materials research
Materials Science
Mechanical properties
Microstructure
MICROSTRUCTURES
Nanotechnology
Precipitation hardening
RECRYSTALLIZATION
Spray deposition
Strain rate
Studies
Temperature
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Summary:An Al–10.83Zn–3.39Mg–1.22Cu–0.16Zr–0.16Sc alloy was produced using the spray deposition technology. The microstructure evolution within temperature ranging between 613 K and 733 K during hot pressing process at different initial strain rate was investigated in a transmission electron microscope (TEM). Partial resolution of the primary precipitates in the deposited microstructure, such as η-MgZn2 and Al3(ScZr), took place. Moreover, new secondary η-MgZn2 and Al3(ScZr) precipitated from the super saturated solid solution and their effects on the recrystallization were also analyzed. The Al3(ScZr) and η-MgZn2 precipitation can act as barriers for the movement of both dislocations and grain boundaries, which are the main factors for hindering the recrystallization. Additionally, the dislocation slide during hot deformation was also investigated in detail. The spray deposition Al–Zn–Mg–Cu alloy own the well deformability, and the typical perfect dislocations can be found in the hot deformation Al–Zn–Mg–Cu alloy.
ISSN:0884-2914
2044-5326
DOI:10.1557/jmr.2016.224