Attenuation capability of low activation-modified high manganese austenitic stainless steel for fusion reactor system
Attenuation capability of low activation-modified high manganese austenitic stainless steel for fusion reactor system
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DOI：
10.1016/j.fusengdes.2016.08.002
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发表时间：
2016-11
影响因子：
1.7
通讯作者：
M. Eissa;S. El-Kameesy;S. El-fiki;S. Ghali;R. M. E. Shazly;A. Saeed
中科院分区：
文献类型：
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作者：
M. Eissa;S. El-Kameesy;S. El-fiki;S. Ghali;R. M. E. Shazly;A. Saeed
开发了低镍高锰奥氏体不锈钢合金SSMn9Ni和SSMn10Ni，用作聚变反应堆系统的屏蔽材料。制备并研究了标准奥氏体不锈钢 SS316L 作为参考样品。使用舍弗勒图、光学显微镜和 X 射线衍射图研究了当前不锈钢合金的微观结构性能。对于制备的不锈钢合金，主要观察到奥氏体相。此外，在 SS316L 和 SSMn10Ni 样品中观察到了小的铁素体相。通过维氏硬度和室温拉伸试验研究了所制备合金的力学性能。研究的锰不锈钢合金表现出比 SS316L 更高的硬度、屈服强度和极限抗拉强度。另一方面，锰不锈钢的延伸率比标准 SS316L 的延伸率相对较低。使用 241 Am-Be 中子源进行慢中子和总慢中子（初级中子和样品中减速的中子）的去除截面。对60Co和232Th放射源发出的不同伽马射线能量线进行了伽马射线衰减参数分析。所开发的锰不锈钢合金具有比 SS316L 更高的总慢速去除截面。而对于所有研究的不锈钢合金来说，慢中子和伽马射线几乎相同。从所得结果来看，由于锰同位素与镍相比寿命较短，所开发的锰不锈钢合金可被视为低活化聚变反应堆系统的候选材料。
Low nickel-high manganese austenitic stainless steel alloys, SSMn9Ni and SSMn10Ni, were developed to use as a shielding material in fusion reactor system. A standard austenitic stainless steel SS316L was prepared and studied as a reference sample. The microstructure properties of the present stainless steel alloys were investigated using Schaeffler diagram, optical microscopy, and X-ray diffraction pattern. Mainly, an austenite phase was observed for the prepared stainless steel alloys. Additionally, a small ferrite phase was observed in SS316L and SSMn10Ni samples. The mechanical properties of the prepared alloys were studied using Vickers hardness and tensile tests at room temperature. The studied manganese stainless steel alloys showed higher hardness, yield strength, and ultimate tensile strength than SS316L. On the other hand, the manganese stainless steel elongation had relatively lower values than the standard SS316L. The removal cross section for both slow and total slow (primary and those slowed down in sample) neutrons were carried out using241Am-Be neutron source. Gamma ray attenuation parameters were carried out for different gamma ray energy lines which emitted from60Co and232Th radioactive sources. The developed manganese stainless steel alloys had a higher total slow removal cross section than SS316L. While the slow neutron and gamma rays were nearly the same for all studied stainless steel alloys. From the obtained results, the developed manganese stainless steel alloys could be considered as candidate materials for fusion reactor system with low activation based on the short life time of manganese isotopes in a comparison with nickel.