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Title: Irradiation behaviour of α2 and γ phases in He ion implanted titanium aluminide alloy
Authors: Zhu, HL
Wei, T
Blackford, MG
Short, KT
Carr, DG
Harrison, RP
Edwards, L
Seo, DY
Maruyama, K
Keywords: Alloys
Issue Date: 1-Jul-2014
Publisher: Elsevier
Citation: Zhu, H., Wei, T., Blackford, M., Short, K., Carr, D., Harrison, R., Edwards, L., Seo, D. & Maruyama, K. (2014). Irradiation behaviour of α2 and γ phases in He ion implanted titanium aluminide alloy. Intermetallics, 50(0), 28-33. doi:10.1016/j.intermet.2014.02.005
Abstract: A Ti–45Al–2Nb–2Mn + 0.8 vol.% TiB2 (at.%) alloy with fully lamellar microstructure consisting of hexagonal-close-packed (hcp) α2 and face-centred-tetragonal (fct) γ phases was irradiated by implanting helium ions to different fluences. Microstructural examination showed that helium cavities are formed in both the α2 and γ phases after He-ion irradiation. However, the helium cavities and their size change with fluence are much larger in the α2 phase than those in the γ phase, indicating that the γ phase exhibits better tolerance to the He-ion irradiation than the α2 phase. Since α2 and γ phases have different crystal structures, they possess differences in helium solubility and interstitial migration. These differences are responsible for the variation in radiation damage behaviour between the two phases. © 2014, Elsevier Ltd.
Gov't Doc #: 7763
ISSN: 0966-9795
Appears in Collections:Journal Articles

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