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本文综述了在能源转换系统中氦工质对结构材料行为的影响。用于反应堆燃料的包复材料——不锈钢,由于受到α-粒子的轰击而在钢基体内部产生氦,这种溶解的氦在高温作用下聚集成氦泡,可能引起材料的脆化。在高温氦环境中所引起的腐蚀是由于混入到氦中的杂质——氢、水、一氧化碳、二氧化碳和甲烷等引起的。在低氧势下,合金表面不易形成致密的保护性氧化膜,将发生渗碳等类型的腐蚀,改变了表面层的组织,因此对材料的机械性能产生某些不利的影响,这是在选材设计中要注意的问题!
This article reviews the effect of helium working material on the behavior of structural materials in energy conversion systems. The cladding material used for reactor fuel - stainless steel, generates helium inside the steel matrix due to the a-particle bombardment. This dissolved helium accumulates into a helium bubble under high temperature and may cause embrittlement of the material. Corrosion caused in a high-temperature helium environment is caused by impurities such as hydrogen, water, carbon monoxide, carbon dioxide and methane mixed into the helium. In the low oxygen potential, the alloy surface is not easy to form a dense protective oxide film, carburizing and other types of corrosion will occur, changing the surface layer of the organization, so the mechanical properties of the material have some adverse effects, which is in the selection Design to pay attention to the problem!