Stability of nanoclusters in an oxide dispersion strengthened alloy under neutron irradiation. (September 2017)

• Record Type: Journal Article
• Authors: Liu, Xiang; Miao, Yinbin; Wu, Yaqiao; Maloy, Stuart A.; Stubbins, James F.
• Is Part Of: Scripta materialia. Number 138(2017)
• Page Start: 57
• Page End: 61
• Publication Date: 2017-09
• Subjects: Oxide dispersion strengthened (ODS) alloy -- Microstructure -- Atom probe tomography -- Neutron irradiation; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.05.023
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Here, we report atom probe tomography results of the nanoclusters in a neutron-irradiated oxide dispersion strengthened alloy. Following irradiation to 5 dpa at target temperatures of 300 °C and 450 °C, fewer large nanoclusters were found and the residual nanoclusters tend to reach an equilibrium Guinier radius of 1.8 nm. With increasing dose, evident decrease in peak oxygen and titanium (but not yttrium) concentrations in the nanoclusters was observed, which was explained by atomic weight, solubility, diffusivity, and chemical bonding arguments. The chemical modifications indicate the equilibrium size is indeed a balance of two competing processes: radiation enhanced diffusion and collisional dissolution. Graphical abstract: