Changes in the Microhardness and Young's Modulus in 2 MeV C+ Ion-Irradiated IG-110 Nuclear Graphite
The changes in the microhardness and Young’s modulus of the 2 MeV C+ ion–irradiated IG-110 isotropic nuclear graphite were evaluated by a dynamic ultra-microhardness test. Indentation depth and load dependency of the hardness and elastic modulus were observed possibly due to the formation of a range. Both the hardness and Young’s modulus (E) – dpa curves have shown an incubation dose for about ı 0.3 mdpa. After the incubation dose, both the hardness and E showed a rapid increase with the dose. The doses that corresponds to these rapid increases in the hardness and E coincides with the dose that corresponds to the beginning of the irradiationinduced surface distortion, and the loss of the graphite crystallinity (amorphization).
Z.Y. Zhong, H. Saka, T.H. Kim, E.A. Holm, Y.F. Han and X.S. Xie
S. H. Chi et al., "Changes in the Microhardness and Young's Modulus in 2 MeV C+ Ion-Irradiated IG-110 Nuclear Graphite", Materials Science Forum, Vols. 475-479, pp. 1471-1474, 2005