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Thermal Stability Of Electrodeposited Nanocrystalline Ni-45%Fe Alloys

Published online by Cambridge University Press:  10 February 2011

F. Czerwinski ,
H. Li ,
F. Megret ,
J. A. Szpunar ,
D. G. Clark  and
U. Erb
F. Czerwinski
Affiliation:
Department of Metallurgical Engineering, McGill University, Montreal, PQ H3A 2A7, Canada
H. Li
Affiliation:
Department of Metallurgical Engineering, McGill University, Montreal, PQ H3A 2A7, Canada
F. Megret
Affiliation:
Department of Metallurgical Engineering, McGill University, Montreal, PQ H3A 2A7, Canada
J. A. Szpunar
Affiliation:
Department of Metallurgical Engineering, McGill University, Montreal, PQ H3A 2A7, Canada
D. G. Clark
Affiliation:
Department of Materials and Metallurgical Engineering, Queen's University, Kingston, Ont., K7L 3N6, Canada
U. Erb
Affiliation:
Department of Materials and Metallurgical Engineering, Queen's University, Kingston, Ont., K7L 3N6, Canada
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Abstract

Electrolytically deposited nanocrystalline Ni-45%Fe alloys, composed of γ (f.c.c.) phase, were annealed at 573 and 673 K for time periods up to 20 h in an inert atmosphere of argon. The evolutions of crystallographic texture, grain size, and microhardness were analyzed as a function of annealing parameters. The initial grains, approximately 5 nm in size increased after annealing up to 10–20 nm, however, the growth kinetics and the final grain size depended on the temperature. A correlation was found between the grain size and alloy microhardness. The phase composition was unstable and during annealing the α(b.c.c) phase was detected to precipitate from the γ matrix. The texture of γ phase, consisted of two fibre components of <111> and <200>, and evolved at high temperatures. Although the detailed changes depended on the annealing temperature, in general, the <111> component became stronger at the expense of the <200> component.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 451: Symposium P – Electrochemical Synthesis and Modification , 1996 , 501
Copyright
Copyright © Materials Research Society 1997

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References

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