Program to Develop High Strength Aluminum Powder Metallurgy Products. Phase 4. Scale-up to 3200-lb. Billets
Abstract
Cracking of the 3100 lb isostatic compact due to water leaking into the rubber mold and the low compact strength led to a process revision. Vibratory powder packing in the vacuum preheat container will replace cold isostatic pressing prior to encapsulation for vacuum preheating. Eight lots of powder were produced for powder billet fabrication, four lots each in MA87 and MA67 alloys. Vacuum can design was developed to maximize the powder weight in the hot compacting tools. By vibratory packing, powder density was raised from 45% to 59% of theoretical density. An evacuation line pinch-off tool was designed, constructed and successfully used to close 2-in. aluminum pipe.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 05, 1974
- Accession Number
- ADA005661
Entities
People
- Walter S. Cebulak