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金属学报  2014 

316奥氏体不锈钢离子辐照损伤中的温度效应研究

DOI: 10.11900/0412.1961.2014.00099, PP. 1189-1194

Keywords: 316奥氏体不锈钢,氙离子辐照,辐照硬化,温度效应

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Abstract:

采用7MeV的Xe26+和1MeV的Xe20+在室温和600℃下分别对316SS块体和TEM试样进行了辐照实验.利用纳米压痕仪测试材料辐照损伤前后的显微硬度,利用TEM观察辐照损伤前后的微观结构演变,并将室温和600℃的实验结果进行了比对.结果表明,室温离子辐照造成316SS中形成大量尺寸在3~8nm之间的位错环缺陷,它们会阻碍材料内位错线的自由移动,进而导致材料的硬化.在600℃辐照下,316SS内形成了尺寸介于4~12nm之间的溶质原子团簇缺陷.尽管其尺寸较室温辐照下形成的位错环有轻微的增大,但是其体积密度较前者显著地降低,辐照硬化现象发生了明显的回复,材料辐照损伤行为存在温度效应.

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