Advanced oxide dispersion strengthened and nanostructured ferritic alloys. (October 2013)

• Record Type: Journal Article
• Authors: Miller, M. K.; Parish, C. M.; Li, Q.
• Is Part Of: Materials science and technology. Volume 29:Number 10(2013:Oct.)
• Page Start: 1174
• Page End: 1178
• Publication Date: 2013-10
• Subjects: Oxide dispersion strengthened alloys -- Nanostructured ferritic alloys -- Atom probe tomography -- Nanoclusters -- Grain boundaries -- Review; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1179/1743284713Y.0000000207
• Languages: English
• ISSNs: 0267-0836

Abstract

Abstract : Nanostructured ferritic alloy is a subcategory of oxide dispersion strengthened steels intended for advanced reactor applications. The complex ultrafine grained microstructure of an advanced nanostructured ferritic alloy, as determined by electron microscopy and atom probe tomography, is summarised. Three distinct populations of precipitates were observed: 20–50 nm Ti(N, O, C), 5–10 nm diameter Y2 Ti2 O7 /Y2 TiO5 and 1–4 nm diameter Ti, Y, O enriched nanoclusters. The first two populations were predominantly located along grain boundaries together with Cr, W and C segregation. A dense population of nanoclusters was observed both in the grain interior as well as on the grain boundaries. These nanoclusters are highly tolerant to high dose irradiation at elevated temperatures.