Metallurgical Characterization of Aluminum Powder Consolidation.
Abstract
The influence of metallurgical and process variables on the consolidation, densification, and properties of rapidly solidified aluminum alloy powders was investigated. Cold compaction, hot pressing, powder extrusion, and explosive consolidation were used to consolidate rapidly solidified 99.9% aluminum powder. The alloys included in the study provide wide variations in hardness, flow stress, work hardening rate, plasticity, and oxide-film thickness. The consolidation techniques for the study provide variations in pressure, compaction rate, and extent of oxide film breakdown. Three 35-kg lots of rapidly solidified 99.9% A1 and aluminum alloy powders were prepared by vacuum atomization, and the powders were characterized with respect to particle size distribution, cooling rates, constituent phases, and volatile contaminants. The pressure dependence of densification during cold compaction was correlated with the yield stress and work hardening of the alloys. Keywords: Aluminum alloys, Hot pressing, Densification, Microstructure, Zirconium, Powder metallurgy, Extrusion, Recovery, Porosity, Degassing, Rapid solidification, Explosive consolidation, Interparticle bonding, Lithium, Recrystallization, Consolidation, Iron, Cerium.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1987
- Accession Number
- ADA182165
Entities
People
- J. E. O'neal
- R. J. Lederich
- S. M. Sastry
- T. C. Peng