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Evolution of defects in titanium grade 2 under Ti2+ion irradiation

Jouanny, Eléonore and Doriot, Sylvie and Malapate, Joël and Dehmas, Moukrane and Allais, Lucien and Le Thuaut, M. and Millot, Thierry Evolution of defects in titanium grade 2 under Ti2+ion irradiation. (2017) Journal of Microscopy, 265 (3). 275-286. ISSN 0022-2720

(Document in English)

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Official URL: http://dx.doi.org/10.1111/jmi.12499


The complexity and diversity of microstructure involved in titanium alloysmakeit rather difficult to quantitatively describe defect evolution due to irradiation. This paper focusesondefect evolutions of commercially pure titanium grade 2 under Ti2+ ion irradiation considering the effect of dose (0.6 and 3 dpa), temperature (300°C and 430°C) and flux (15:1 ratio). An irradiation damage profile was predicted using SRIM software to obtain a homogeneous damage on at least 500 nm depth for TEM observations and simulated using JANNUS-Saclay facility. The details regarding the quantification methodologies of the defects from dark field images are provided, as are the origins of the associated uncertainties. In addition to a tangled dislocation network, presence of the <a>-type and <c>-component loops is observed. The latter was scarcely reported in the literature in the case of titanium alloys. At low temperature, the size distribution of the <a>-type dislocation loops remained similar regardless of the dose and flux whereas these parameters have highly influence at 430°C. A widening of the size distribution and an increase of the threshold incubation dose (TID) was noted with the temperature. In the case of the <c>-component loops, it was shown that the nucleation occurred in spite of the 0.6 dpa low dose.

Item Type:Article
Additional Information:Thanks to Wiley editor. The original PDF of the article can be found at Journal of Microscopy website : http://onlinelibrary.wiley.com/doi/10.1111/jmi.12499/pdf
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE)
French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Centre d'Etude des Structures et Matériaux Navals - CESMAN (FRANCE)
Other partners > Université de Lorraine (FRANCE)
Laboratory name:
Deposited On:22 Dec 2017 07:59

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