Microstructural evolution of Fe-22%Cr model alloy under thermal ageing and ion irradiation conditions studied by atom probe tomography
Journal article, 2016
Nanostructure evolution during ion irradiation of two thermally aged binary Fee22Cr alloys has been investigated using atom probe tomography. Specimens aged at 500 °C for 50 and 200 h were irradiated by 5.6 MeV Fe ions at room temperature up to fluences of 0.3 × 1015 ions/cm2 and 1 × 1015 ions/cm2. The effect of irradiation on the material nanostructure was examined at a depth of 1 ?m from the irradiated surface. The analysis of Cr radial concentration functions reveals that dense ??-phase precipitates in the 200 h aged alloy become diffuse and thereby larger when subjected to irradiation. On the other hand, less Cr-enriched precipitates in the alloy aged for 50 h are less affected. The CreCr pair correlation function analysis shows that matrix inhomogeneity decreases under irradiation. Irradiation leads to a decrease in the number density of diffuse clusters, whereas in the case of well-developed precipitates it remains unchanged.
Ion irradiation
Phase decomposition
Fe-Cr
Atom-probe tomography
Author
O. A. Korchuganova
National Research Nuclear University
Alikhanov Institute for Theoretical and Experimental Physics
Mattias Thuvander
Chalmers, Physics, Materials Microstructure
A. A. Aleev
National Research Nuclear University
Alikhanov Institute for Theoretical and Experimental Physics
Sergey V. Rogozhkin
National Research Nuclear University
Alikhanov Institute for Theoretical and Experimental Physics
Torben Boll
Chalmers, Physics, Materials Microstructure
Timur V. Kulevoy
Alikhanov Institute for Theoretical and Experimental Physics
National Research Nuclear University
Journal of Nuclear Materials
0022-3115 (ISSN)
Vol. 477 172-177Subject Categories
Other Engineering and Technologies
DOI
10.1016/j.jnucmat.2016.05.007