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硅对低活化马氏体钢电子辐照行为的影响

Effect of Silicon on Electron Irradiation Behavior in China Low Activation Martensitic Steels

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【Author】 ZHAO Fei~1,QIAO Jian-sheng~1,HUANG Yi-na~1,WAN Fa-rong~1,XU Yong-li~2,SHIBAYAMA Tamaki~3,OHNUKI Soumei~3(1.Department of Materials Physics and Chemistry,University of Science and Technology Beijing,Beijing 100083,China;2.China Institute of Atomic Energy,Beijing 102413,China;3.Faculty of Engineering,Hokkaido University,Sapporo 060-8628,Japan)

【机构】北京科技大学材料物理与化学系；中国原子能科学研究院；北海道大学工学部；北海道大学工学部北京100083；北京100083；北京102413；札幌060-8628日本；

【摘要】利用超高压透射电子显微镜研究了两种成分的低活化马氏体钢(CLAM钢)的辐照损伤行为。结果表明:电子辐照能在未添加硅的CLAM钢中产生辐照空洞;在450℃下辐照至14 dpa时,空洞数密度约为8.7×1021m-3,辐照肿胀率约为0.26%;在450℃下的辐照肿胀率明显比500℃下的高;当损伤率为2×10-3dpa/s时,添加合金元素硅能显著提高CLAM钢的抗辐照肿胀能力,未在添加硅的CLAM钢中实验观察到辐照空洞的形成。在450℃下进行辐照时,添加硅的CLAM钢出现明显的辐照共格析出现象。更多还原

【Abstract】 The irradiation damage behavior of two China low activation martensitic(CLAM) steels with different composition was studied by high voltage electron microscope.The results indicate that a lot of voids form in CLAM steel without silicon addition during electron irradiation.When irradiated to 14 dpa at 450 ℃,the number density of voids is about 8.7×10~21 m~-3,and the irradiation swelling is approximately 0.26%.The irradiation swelling of CLAM steel without silicon addition at 450 ℃ is larger than that of at 500 ℃.When the irradiation damage rate is 2×10~-3 dpa/s,no voids can be found in CLAM steel with silicon addition,so silicon is a good alloying element for irradiation swelling resistance in CLAM steels.When irradiated at 450 ℃,a kind of coherent precipitates form in silicon added CLAM steel.更多还原

【关键词】核聚变；低活化；马氏体钢；辐照损伤；
【Key words】 nuclear fusion； low activation； martensitic steel； irradiation damage；

【基金】国家自然科学基金资助项目(50571019)

【文献出处】原子能科学技术 ,Atomic Energy Science and Technology , 编辑部邮箱 ,2008年01期

【分类号】TL627
【被引频次】20
【下载频次】322

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