Effect of Neutron Irradiation on Mechanical Properties of Cu-Alloy/SS316 Joints

摘要

The effects of neutron irradiation on tensile properties of the Cu alloys to type 316 stainless steel (SS316) joints fabricated by friction welding method were examined. Additionally, irradiation tests of Al_2O_3-dispersed copper alloy (Al-15), oxygen free copper (OF-Cu) and SS316 were conducted. The Al-15/SS316 and OF-Cu/SS316 joints were irradiated in the Japan Materials Testing Reactor (JMTR), and tension tests and metallographical observation of thers joints have been performed as the post irradiation examination (PIE). In the tension tests of Al-15/SS316 and OF-Cu/SS316 joints, all irradiated specimens fractured at the copper sides. In the tension tests at 293K, tensile strength of the Al-15/SS316 joints irradiated at 693K was equal to that of the base metal (Al-15) irradiated in the same condition. On the other hand, temsile strength of Al-15/SS316 joints was smaller than that of Al-15 in the tension test at the same temperature as each irradiation temperature. In this study, useful data of the irradiated Al-15/SS316 and OF-Cu/SS316 joints fabricated by friction welding method were obtained to design fusion reactors.