Accession Number:

AD0744845

Title:

Microstructure of Powder and Conventionally Processed 7075 Aluminum Alloy.

Descriptive Note:

Final rept. Sep 69-Jun 71,

Corporate Author:

AIR FORCE MATERIALS LAB WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

• Jacobson,L. A.
• Pierce,C. M.
• Cook,M. M.

Report Date:

1971-12-01

Pagination or Media Count:

25.0

Abstract:

Aluminum alloy powder of the 7075 composition was consolidated by warm upset and extrusion. Commercial cast and wrought material was also extruded to serve as a control. Results of varying the length of time at solution treatment temperature indicate that the powder material is far less resistant to recrystallization than the conventional material. Optical and transmission electron microscopy revealed that after identical post-extrusion solution treatments the substructure formed during extrusion throughout the commercial material was stable while the powder material retained substructure only near the edges of the rectangular extrusion and had undergone complete recrystallization toward the center. Author

Descriptors:

• (*ALUMINUM ALLOYS
• *MICROSTRUCTURE)
• POWDER ALLOYS
• HEAT TREATMENT
• EXTRUSION

Subject Categories:

• Properties of Metals and Alloys
• Crystallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE