Effect of Two-Stage Aging on Microstructure of 7075 Aluminum Alloys

Differential scanning calorimetry (DSC) and transmission electron microscopy (TEM) were used to establish the microstructural effects of various multistage aging treatments on aluminum alloy 7075. DSC was used to characterize the matrix microstructure while TEM was used to characterize the grain bou...

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Bibliographic Details
Main Author: Papazian, John M
Format: Report
Language:English
Subjects:
AGING(MATERIALS)
ALUMINUM ALLOY 7075
ALUMINUM ALLOY 7075- T7
ALUMINUM ALLOY 7075-T23
ALUMINUM ALLOY 7075-T6
ALUMINUM ALLOY 7075-T651
ALUMINUM ALLOYS
DIFFERENTIAL SCANNING CALORIMETRY
Fabrication Metallurgy
GRAIN BOUNDARIES
HEAT TREATMENT
Laminates and Composite Materials
MATRIX MATERIALS
MICROSTRUCTURE
Properties of Metals and Alloys
STAGING
STRESS CORROSION
TRANSMISSION ELECTRON MICROSCOPY
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Summary:Differential scanning calorimetry (DSC) and transmission electron microscopy (TEM) were used to establish the microstructural effects of various multistage aging treatments on aluminum alloy 7075. DSC was used to characterize the matrix microstructure while TEM was used to characterize the grain boundary precipitates. The aging treatments were in five categories: isochronal pre- aging, isothermal pre-aging, final again at 150 C , commercial type two-stage aging treatments, and retrogression and re-aging (RRA) treatments.