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Cold-Deformation and Annealing of equiaxed L1o-ordered FePd Intermetallics

Published online by Cambridge University Press:  26 February 2011

Anirudha Desphande  and
Jorg Wiezorek
Anirudha Desphande
Affiliation:
anirudha.desphande@ge.comUniversity of PittsburghDept. of Materials Science and EngineeringGE-lighting technologyWilloughby OH 44094United States
Jorg Wiezorek
Affiliation:
wiezorek@pitt.edu, University of Pittsburgh, Dept. of Materials Science and Engineering, 848 Benedum Hall, Pittsburgh, PA, 15261, United States
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Abstract

The L10 ordering equiatomic intermetallic FePd has been used as a model system for the investigation of the evolution of microstructure and properties during annealing at temperatures below the ordering temperature after deformation in the L10 state. The two different routes for the preparation of equiaxed L10 FePd polycrystals, annealing after cold deformation in the disordered FCC state or after cold deformation in the ordered state, produce similar grain size distributions, differ in the transformation kinetics and importantly in the sequence of texture evolution during the post-cold-deformation annealing. Cold deformed L10 FePd progresses through the classic stages of annealing known from studies of disordered elemental metals and alloys based on them. The reduced L10 SLRO of the ‘mechanically disordered’ FePd is recovered in the early stages of annealing and both the recrystallization and the grain growth stages are quite sluggish, presumably because of the slow diffusion processes in the L10 lattice.

Keywords

cold workingmicrostructurephase transformation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 980: Symposium II – Advanced Intermetallic-Based Alloys , 2006 , 0980-II03-06
Copyright
Copyright © Materials Research Society 2007

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