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Program to Develop High Strength Aluminum Powder Metallurgy Products. Phase IV. Scale up to 3200 lb. Billets.
Quarterly rept. no. 6, 20 Dec-19 Dec 73, on Phase 4,
ALUMINUM CO OF AMERICA ALCOA CENTER PA
Pagination or Media Count:
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.
APPROVED FOR PUBLIC RELEASE