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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/8239

Title: Irradiation behaviour of α2 and γ phases in He ion implanted titanium aluminide alloy
Authors: Zhua, H
Wei, T
Blackford, M
Short, K
Carr, D
Harrison, R
Edwards, L
Seo, D
Maruyama, K
Keywords: ALLOYS
MICROSTRUCTURE
HELIUM
IONS
MICROSTRUCTURE
RADIATIONS
Issue Date: 1-Jul-2014
Publisher: Elsevier
Citation: Zhu, H., Wei, T., Blackford, M., Short, K., Carr, D., Harrison, R., . . . Maruyama, K. (2014). Irradiation behaviour of α2 and γ phases in He ion implanted titanium aluminide alloy. Intermetallics, 50(0), 28-33. doi: http://dx.doi.org/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.
URI: http://dx.doi.org/10.1016/j.intermet.2014.02.005
http://apo.ansto.gov.au/dspace/handle/10238/8239
ISSN: 0966-9795
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