Journal
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
Volume 527, Issue 15, Pages 3572-3580Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2010.02.043
Keywords
Mechanical alloying; Nanostructured materials; Grain growth
Categories
Funding
- National Science Foundation [0504286]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0504286] Funding Source: National Science Foundation
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Fe-Zr nanocrystalline alloys with an as-milled grain size less than 10 nm were synthesized by ball milling. The microstructure changes due to annealing were characterized using X-ray line broadening, microhardness, focused ion beam channeling contrast imaging, and transmission electron microscopy (TEM). Additions of 1/3 to 4 at.% Zr stabilized nanocrystalline grain sizes at elevated annealing temperatures compared to pure Fe. With 4 at.% Zr, a fully nanocrystalline microstructure with a TEM grain size of 52 nm was retained at temperatures in excess of 900 degrees C. Alloys with lower Zr contents showed less stability, but still significant compared to pure Fe. Bimodal nano-micro grain size microstructures were also observed. (c) 2010 Elsevier B.V. All rights reserved.
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