SYMPOSIA PAPER Published: 01 January 2004
STP11240S

Irradiation Hardening and Microstructural Evolution in Fe-Cu Model Alloys

Source

Irradiation hardening and microstructural evolution und neutron and electron irradiation have been investigated for pure-Fe and Fe-Cu model alloys. Neutron and electron irradiations were performed in the Japan Material Test Reactor (JMTR) and with using Phodtron electron accelerator at about 290°C and 270±30°C, respectively. Irradiation hardening of pure-Fe and Fe-Cu model alloys is saturated at about 1 × 10-3 dpa in both the neutron and electron irradiation. Irradiation hardening recovered in two temperature ranges. The recovery in the lower temperature range depends on copper concentration and electron irradiation dose, while the recovery at a higher temperature range does not. Recovery behavior of the irradiation hardening suggests indirectly that copper atoms suppress the growth of interstitial clusters. The recovery behavior of positron lifetime does not coincide with that of the hardness, suggesting that the vacancy clusters are not the direct main factor controlling the hardening by matrix damages.

Author Information

Kitao, T
Institute of Advanced Energy, Kyoto University, Uji, Kyoto, Japan
Kasada, R
Institute of Advanced Energy, Kyoto University, Uji, Kyoto, Japan
Kimura, A
Institute of Advanced Energy, Kyoto University, Uji, Kyoto, Japan
Nakata, H
Institute of Nuclear Safety System, Inc., Mihama-cho, Fukui, Japan
Fukuya, K
Institute of Nuclear Safety System, Inc., Mihama-cho, Fukui, Japan
Matsui, H
Institute for Materials Research, Tohoku University, Katahira, Sendai, Japan
Narui, M
Institute for Materials Research, Tohoku University, Oarai, Ibaraki, Japan
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Details
Developed by Committee: E10
Pages: 365–375
DOI: 10.1520/STP11240S
ISBN-EB: 978-0-8031-5494-0
ISBN-13: 978-0-8031-3477-5