Morphology, structure, and chemistry of nanoclusters in a mechanically alloyed nanostructured ferritic steel

Journal Article · Sat Jan 14 04:00:00 EST 2012 · Journal of Materials Science

DOI:https://doi.org/10.1007/s10853-012-6249-x· OSTI ID:1037941

Brandes, M C; Kovarik, Libor; Miller, Michael K; Mills, M J

Nanostructured ferritic steels have excellent high temperature creep properties and radiation tolerance due to the presence of a high density of Ti-Y-O-enriched nanoclusters. The morphology of the nanoclusters is found to be consistent with a truncated rhombic dodecahedron defined by the {l_brace}100{r_brace} and {l_brace}110{r_brace} planes in the Fe matrix. The derived symmetry and the compositional information indicate that the nanoclusters are inconsistent with the cubic Y2Ti2O7 or the polymorphs of Y2TiO5 phase. Possible structural models are discussed.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1037941
• Report Number(s): PNNL-SA-75316
• Journal Information: Journal of Materials Science, Journal Name: Journal of Materials Science Journal Issue: 8 Vol. 47; ISSN JMTSAS; ISSN 0022-2461
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMISTRY
CREEP
FERRITIC STEELS
MORPHOLOGY
RADIATIONS
STRUCTURAL MODELS
SYMMETRY
TOLERANCE
nanostructured ferritic steel
high-resolution electron microscopy (HREM)
electron energy loss spectroscopy (EELS)
atom probe tomography (APT)