【摘 要】
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The feasibility and benefits of applying grain boundary engineering(GBE)to the fuel cladding material 15-15Ti austenitic stainless steels of liquid-metal-cooled-fast-reactor for reducing the void swel
【机 构】
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School of materials Science and Engineering,Shanghai University,Shanghai 200072,China
【出 处】
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第13届中日双边先进能源系统和聚变裂变工程材料会议(CIS-13)
论文部分内容阅读
The feasibility and benefits of applying grain boundary engineering(GBE)to the fuel cladding material 15-15Ti austenitic stainless steels of liquid-metal-cooled-fast-reactor for reducing the void swelling,corrosion in liquid metal and creep were discussed.The GBE can be used to greatly enhance the proportion of low ΣCSL grain boundaries which are mainly of annealing twins and its variants.The cladding materials were normally subjected to 20%cold working after solid solution annealing before using,which by virtue of providing a dislocation strewn matrix microstructure,contributes to the annihilation of irradiation-induced point defects.If the proportion of low ΣCSL grain boundaries were greatly enhanced via GBE prior to the cold working,the transfer of slip across the special-structured grain boundaries or pile-up against them during deformation may alter the distribution of the dislocations of the microstructure,which may accommodate more defects that generated during being irradiated.In the current work,the effects of thermal-mechanical processing on the grain boundary character distribution of 15-15Ti austenitic stainless steel were investigated.The microstructures of the cold-worked GBE samples were analyzed and compared with that of the conventional samples.
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