Defects in cold-hydrostatically-extruded aluminium, iron and nickel-base powder compacts

Powder metallurgy fabrication techniques have been developed because of their many advantages and for securing an increased homogeneity of resulting metallurgical structure. Various consolidation and forming processes have been employed for producing shaped parts from metal powders. In the present p...

Full description

Saved in:
Bibliographic Details
Published in:Journal of mechanical working technology 1981-01, Vol.4 (4), p.327-340
Main Authors: Mamalis, A.G., Kandeil, A., De Malherbe, M.C., Johnson, W.
Format: Article
Language:English
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Powder metallurgy fabrication techniques have been developed because of their many advantages and for securing an increased homogeneity of resulting metallurgical structure. Various consolidation and forming processes have been employed for producing shaped parts from metal powders. In the present paper, several physical defects created during the cold-hydrostatic extrusion of iron and aluminium powders, initially compacted by cold isostatic pressing, and of nickel-base superalloy powders, initially hot-isostatically compacted, are reported and described. Comparisons are made with well-known similar defects developed during the extrusion of solid metals. Diagrams are proposed which define — in terms of extrusion pressure and reduction — ranges over which sound or defective compacts are produced.
ISSN:0378-3804
DOI:10.1016/0378-3804(81)90001-2