Evaluation on the ring tensile properties of zirconium alloy
Hoop stress is considered as a main cause of fracture for inner pressurized tubes such as the zirconium tube.In this paper,the ring tensile tests were performed in order to evaluate the mechanical properties of high burn-up fuel cladding under a hoop loading condition at a temperature range from room temperature to 400℃.The materials investigated in this study include Zr2,Zr4,N18 and M5.All experiments were carried out at a constant displacement rate of 0.5 mm/min.On the basis of the ring tensile test results,the deformation behavior of zirconium is analyzed,and the following conclusions are drawn.Firstly,the mechanical properties are abruptly degraded with the increasing temperature.Secondly,the fuel cladding shows ductile fracture behaviors.Thirdly,material Zr2 shows the highest strength,but the lowest elongation.The property sequence for the material at room temperature is close to that at high temperature.Although material M5 has a lower strength than Zr2 and N18,it has the highest elongation,besides,the material MS exhibits just nearly the same mechanical properties no matter where produced.At last,based on the test results and finite element analysis,the shortcoming of the hoop tensile test using the integral ring is analyzed.
Ring tensile Zirconium Hoop stress Fuel cladding
Fei Xue Yanfeng Zhao Weiwei Yu Xiao Chen Wenxin Ti Chongzhe Shi
China Guangdong Nuclear Power Suzhou Research Institute,Suzhou 240051,China Xian Technological University,Xi an 710032,China
国际会议
成都
英文
517-521
2009-10-16（万方平台首次上网日期，不代表论文的发表时间）