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TEM Studies Of Devitrification Products in Al-Gd-Ni-(Fe) Alloys.

Published online by Cambridge University Press:  01 February 2011

A. L. Vasiliev ,
M. Aindow ,
M. J. Blackburn  and
T. J. Watson
A. L. Vasiliev
Affiliation:
Department of Metallurgy and Materials Engineering, Institute of Materials Science, University of Connecticut, Storrs, CT 06269–3136, USA.
M. Aindow
Affiliation:
Department of Metallurgy and Materials Engineering, Institute of Materials Science, University of Connecticut, Storrs, CT 06269–3136, USA.
M. J. Blackburn
Affiliation:
Department of Metallurgy and Materials Engineering, Institute of Materials Science, University of Connecticut, Storrs, CT 06269–3136, USA.
T. J. Watson
Affiliation:
Pratt & Whitney, Materials & Process Engineering, Structural Alloys & Processes, 400 Main Street, Mail Stop 114–40, East Hartford, CT 06108, USA.
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Abstract

Metallic glasses can form in certain Al-Gd-Ni alloys. Devitrificaion occurs on subsequent heating to intermediate temperatures and although some phases form as expected the crystal structures of others are less certain. This paper presents a summary of transmission electron microscopy (TEM) data acquired from four devitrified Al-Gd-Ni(-Fe) alloys. It is shown that the alloys exhibit nanocrystalline microstructures consisting of face-centered-cubic α-Al, binary Al3Gd, and ternary phases. An Al-(Gd,Fe)-Ni phase forms as rods and exhibits the orthorhombic Al19Ni5Gd3 structure. Plates of the rhombohedral phase Al23(Ni,Fe)6Gd4 are also present. Complex faulting is observed in both ternary phases.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 806: Symposium MM – Amorphous and Nanocrystalline Metals , 2003 , MM5.9
Copyright
Copyright © Materials Research Society 2004

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