Changes in the Microhardness and Young's Modulus in 2 MeV C+ Ion-Irradiated IG-110 Nuclear Graphite

Abstract:

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).

• Periodical: Materials Science Forum (Volumes 475-479)
• Pages: 1471-1474
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.475-479.1471
• Online since: January 2005
• Authors: Se Hwan Chi, Gen-Chan Kim, Jun Hwa Hong, Sang Chul Kwon, Jong Hwa Chang
• Keywords: Amorphisation, Dynamic Ultra-Microhardness (DUM), Incubation Dose, Ion-Irradiation, Nuclear Graphite

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