Accession Number : ADA100466


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


Descriptive Note : Final rept.


Corporate Author : GRUMMAN AEROSPACE CORP BETHPAGE NY RESEARCH DEPT


Personal Author(s) : Papazian, John M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a100466.pdf


Report Date : Apr 1981


Pagination or Media Count : 56


Abstract : 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.


Descriptors :   *MICROSTRUCTURE , *AGING(MATERIALS) , *ALUMINUM ALLOYS , *HEAT TREATMENT , *STRESS CORROSION , MATRIX MATERIALS , STAGING , GRAIN BOUNDARIES


Subject Categories : Laminates and Composite Materials
      Properties of Metals and Alloys
      Fabrication Metallurgy


Distribution Statement : APPROVED FOR PUBLIC RELEASE