Grain-size stabilization in nanocrystalline FeZr alloys

Nanocrystalline Fe–Zr alloys with a nominal grain size of 10 nm were synthesized by mechanical alloying. The grain size in pure Fe was >200 nm after annealing for 1 h at T/ T M = 0.5. Additions of 1 at.% Zr stabilized the grain size at 50 nm up to T/ T M = 0.92. Particle pinning, solute drag and...

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Bibliographic Details
Published in:Scripta materialia 2008-09, Vol.59 (5), p.530-533
Main Authors: Darling, Kris A., Chan, Ryan N., Wong, Patrick Z., Semones, Jonathan E., Scattergood, Ronald O., Koch, Carl C.
Format: Article
Language:English
Subjects:
Alloys
Ferrous alloys
Grain growth
Grain size
Iron
Iron alloys
Mechanical alloying
Mechanical milling
Nanocrystals
Nanostructure
Reduction
Segregation
Stabilization
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Summary:Nanocrystalline Fe–Zr alloys with a nominal grain size of 10 nm were synthesized by mechanical alloying. The grain size in pure Fe was >200 nm after annealing for 1 h at T/ T M = 0.5. Additions of 1 at.% Zr stabilized the grain size at 50 nm up to T/ T M = 0.92. Particle pinning, solute drag and reduction in grain-boundary energy have been proposed as stabilization mechanisms. The stabilization in Fe–Zr alloys is attributed to a reduction in grain-boundary energy due to Zr segregation.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2008.04.045