摘要
未经腐蚀的国产不锈钢包壳管与在两种不同氧势下经模拟裂变产物腐蚀后的包壳管相比，其室温爆破强度和周向延伸率有明显变化。由于氧势对包壳管腐蚀深度影响显著，从而也明显影响包壳管的爆破强度和周向延伸率。爆破口的微观形貌分析进一步显示了裂变产物腐蚀对包壳管力学性能的影响。试验方法对结果的影响也作了初步探讨。
he room temperature burst strength and maximum circum expansion are measured respec-tively for non-attack and attacked 316-Ti cladding tubes at low and high oxygen potential andthe fracture sections of them are also analysed to understand the extent and mechanism of proper-ties degradation after attack.Degradation of strength and expansion for attacked 316-Ticladding tube at high oxygen potentials,is considerably larger than that at low oxygen potential.The intergranular brittle fracture charactristic in the inner surface of fracture section at high oxy-gen potential is rather remarkable,and there are trace Cs and Te in the brocken grain boundary.This result supports the point of view that the mechanism of the so-called Fuel Adjecency Effect(FAE)is synergetic Cs and Te Fission product induced Liquid-metal Embrittlment.
出处
《核科学与工程》
CSCD
北大核心
1995年第4期337-344,350,共9页
Nuclear Science and Engineering
关键词
爆破强度
延伸率
断裂
晶间腐蚀
包壳
钠冷堆
burst strengh maximum circum expansion tough fracture brittle fracture
