Influence of heat-treatment on tensile behavior of neutron irradiated molybdenum
Influence of heat-treatment on tensile behavior of neutron irradiated molybdenum
复制标题
热处理对中子辐照钼拉伸行为的影响
DOI：
10.1016/s0022-3115(96)00093-1
复制
发表时间：
1996
影响因子：
3.1
通讯作者：
Chusei Namba
中科院分区：
文献类型：
--
作者：
A. Hasegawa;K. Abe;M. Satou;K. Ueda;Chusei Namba
在FFTF/MOTA循环11中，在646 ~ 1073 K的5个温度下辐照去应力和再结晶钼的拉伸试样。照射水平在6.8至34 dpa之间，视辐照温度而定。辐照后进行室温拉伸试验和硬度试验。在792、873和1073 K辐照下，去应力试样的总伸长率为9% ~ 13%，再结晶试样的总伸长率几乎为0%。646 ~ 873 K辐照下应力解除试样的断裂模式为穿晶型，646 ~ 1073 K辐照下再结晶试样的断裂模式为晶间型。在1073 K辐照下，去应力试样出现了晶粒生长和沿晶断口，但总伸长率仍为9%。重要的是，在中子辐照到相对高的影响后，去应力钼在室温下具有足够的延展性。
Tensile specimens of stress-relieved and recrystallized molybdenum were irradiated at five temperatures between 646 and 1073 K in FFTF/MOTA cycle 11. The exposure levels were in the range of 6.8 to 34 dpa depending on the irradiation temperatures. After irradiation tensile tests and hardness test were carried out at room temperature. The total elongation of stress-relived specimens irradiated at 792, 873 and 1073 K ranged from 9 to 13%, and those of recrystallized specimens irradiated at these temperatures were almost 0%. The fracture modes of the stress-relieved specimens irradiated at 646–873 K were transgranular type and those of recrystallized specimens irradiated at 646–1073 K were intergranular type. Grain growth and intergranular fracture surface were observed in the stress-relieved specimen irradiated at 1073 K but it still has 9% total elongation. It is important that the stress-relived molybdenum had enough ductility at room temperature after neutron exposures up to relatively high fluences.