Irradiation Hardening and Microstructure Evolution of Ion-irradiated ODS Ferritic Steels
Irradiation Hardening and Microstructure Evolution of Ion-irradiated ODS Ferritic Steels
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离子辐照 ODS 铁素体钢的辐照硬化和显微组织演变
DOI：
10.1520/jai100701
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
A. Kimura
中科院分区：
文献类型：
--
作者：
K. Yutani;R. Kasada;H. Kishimoto;A. Kimura
采用离子辐照技术研究了氧化物弥散强化（ODS）铁素体钢的辐照硬化和组织变化。本研究所用的材料是K3（16 C-2 W-0.3Ti-4.6Al-0.4Y2O3）ODS铁素体钢，用于第四代概念先进反应堆和聚变反应堆。6.4采用1.7MeV串列加速器，用MeV的Fe ~（3+）离子辐照K3 ODS钢。辐照温度为300°C和500°C。在离辐照表面约600 nm的深度处，标称位移损伤率和总位移损伤分别为1×10−3 dpa/s和高达10 dpa。使用伯科维奇压头评估纳米压痕硬度。在300°C下高达Idpa的离子辐照后，K3 ODS钢的归一化纳米压痕硬度（辐照后硬度/辐照前硬度）达到约1.28，并且该值在高达IOdpa时没有显示出变化。另一方面，在500°C下高达IOdpa的离子辐照没有显示出显著的辐照硬化。TEM观察表明，在300°C时，离子辐照钢中形成了致密而细小的位错环，这可能足以解释辐照硬化的原因。
Irradiation hardening and microstructural change of oxide dispersion strengthened (ODS) ferritic steels were investigated by using the ion-irradiation technique. The material used for the present study was K3 (16C-2W-0.3Ti-4.6Al-0.4Y2O3) ODS ferritic steel for the application to Generation IV concept advanced reactors and fusion reactors. 6.4 MeV Fe3+ ions were used to irradiate to the K3 ODS steel by using a 1.7 MeV tandem accelerator. The irradiation temperatures were 300°C and 500°C. The nominal displacement damage rate and total displacement damage were 1×10−3 dpa/s and up to 10 dpa at about 600-nm depth from the irradiated surface, respectively. Nano-indentation hardness was evaluated with a Berkovich indenter. After the ion-irradiation at 300°C up to 1 dpa, the normalized nano-indentation hardness (hardness after irradiation/hardness before irradiation) of the K3 ODS steel reached about 1.28 and the value showed no change up to 10 dpa. On the other hand, the ion-irradiation at 500°C up to 10 dpa showed no significant irradiation hardening. TEM observation revealed that dense and fine dislocation loops were formed in the ion-irradiated steels at 300°C, which were probably enough to explain the irradiation hardening.
影响因子：
1.7
作者：
A. Kimura;R. Kasada;A. Kohyama;S. Konishi;M. Enoeda;M. Akiba;S. Jitsukawa;S. Ukai;T. Terai;A. Sagara
通讯作者：
A. Kimura;R. Kasada;A. Kohyama;S. Konishi;M. Enoeda;M. Akiba;S. Jitsukawa;S. Ukai;T. Terai;A. Sagara