中子辐照对15MnTi钢力学性能影响

Effects of Neutron Irradiation on Mechanical Properties of 15MnTi Steel

通过冲击试验、单向拉伸试验研究了中子辐照对15MnTi钢拉伸、冲击性能影响。中子辐照温度50℃、累计快中子注量1.5066×10^(18)cm^(-2),获得15MnTi钢母材、热影响区辐照前后冲击功及15MnTi钢室温、300℃下辐照前后拉伸曲线。试验结果表明,中子辐照导致15MnTi钢母材、热影响区韧脆转变温度上升,其中母材增幅较热影响区大,但冲击功上平台变化不大;15MnTi钢母材屈服强度、拉伸强度上升,其中室温屈服强度变化大,高温拉伸性能变化不明显。

Through impact tests and uniaxial tensile tests, the effects of neutron irradiation on the tensile properties and impact performance of 15 MnTi steel are studied. Impact energy of parent metal and heat-affected zone(HAZ) of 15 MnTi steel and tension curves of 15 MnTi steel at room temperature and 300℃ before and after irradiation with neutron irradiation temperature 50℃ and cumulative fast neutron flux 1.5066×1018 cm-2 are obtained. Results show that the neutron irradiation increases the ductile brittle transition temperature(DBTT) of the parent metal and HAZ of 15 MnTi steel, in which the parent metal increases more than HAZ, while the upper shelves of impact energy change little; yield strength and tensile strength of the parent metal of 15 MnTi steel increase after irradiation, especially the yield strength at room temperature, but the tensile properties at high temperature change little.