Consolidation of Al-Fe-Nd Atomised Powders

Aluminum-based alloys with a nanocomposite microstructure consisting of a dispersion of Al particles in nanoscale size in an amorphous matrix can be produced by rapid solidification processes. Such microstructures are of interest since they can present high tensile strength without loss of ductility...

Full description

Saved in:
Bibliographic Details
Published in:Key engineering materials 2001-01, Vol.189-191, p.258-263
Main Authors: Lieblich, M., Cardoso, K.R., Garcia Escorial, Asuncion, Botta Filho, Walter José
Format: Article
Language:English
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Aluminum-based alloys with a nanocomposite microstructure consisting of a dispersion of Al particles in nanoscale size in an amorphous matrix can be produced by rapid solidification processes. Such microstructures are of interest since they can present high tensile strength without loss of ductility. A novel alloy powder of the Al-Fe-Nd system was developed, and produced by gas atomization. The atomized powder showed a high level of metastability, presenting in the finer powder range a nanocomposite microstructure composed of amorphous phase and nanocrystals. In the present work, powders of different size ranges obtained by helium atomization of an Al90Fe5Nd5 alloy were consolidated. The microstructure of the bulk material obtained by hot-extrusion was investigated by X-ray diffraction and scanning electron microscopy. Yield strength above 700 MPa was obtained by the hot extrusion of atomized powders smaller than 25 microns. (Author)
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.189-191.258