Accession Number:

AD0780455

Title:

Program to Develop High Strength Aluminum Powder Metallurgy Products. Phase IV. Scale up to 3200 lb. Billets.

Descriptive Note:

Quarterly rept. no. 6, 20 Dec-19 Dec 73, on Phase 4,

Corporate Author:

ALUMINUM CO OF AMERICA ALCOA CENTER PA

Personal Author(s):

• Cebulak,W. S.

Report Date:

1974-04-26

Pagination or Media Count:

23.0

Abstract:

Preheating with Ar or no gas flow followed by evacuation and vacuum hot pressing gave PM wrought products with high fracture toughness only when the vacuum can temperature was maintained above 800F. Vacuum preheating and vacuum hot pressing imparted high toughness in PM wrought products for can temperatures from 600F to 820F. MA87 extrusions from compacts preheated below the alloy solidus gave higher transverse fracture toughness than earlier extrusions preheated above the solidus temperature.

Descriptors:

• *Powder metallurgy
• *Aluminum alloys
• High strength
• Powder alloys
• Compacting
• Isostatic pressing
• Hot pressing
• Billets
• Extrusion
• Vacuum apparatus

Subject Categories:

• Metallurgy and Metallography
• Fabrication Metallurgy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE