模拟裂变产物腐蚀对国产不锈钢包壳管室温爆破性能的影响  

INFLUENCE OF FISSION PRODUCTS CORROSION ON ROOM TEMPERATURE BURST STRENGTH EXTENSION OF DOMESTIC STAINLESS STEEL CLADDING TUBES USED FOR FBR

作　　者：许咏丽[1] 李军刚[1] 王家英[1] 

机构地区：[1]中国原子能科学研究院

出　　处：《核科学与工程》1995年第4期337-344,350,共9页Nuclear Science and Engineering

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.

关 键 词：爆破强度 延伸率 断裂 晶间腐蚀 包壳 钠冷堆 

分 类 号：TL352.22[核科学技术—核技术及应用]