Helium effects on EUROFER97 martensitic steel irradiated by dual-beam from 1 to 50 dpa at 250 and 300 °C with 10 He appm/dpa
Helium effects on EUROFER97 martensitic steel irradiated by dual-beam from 1 to 50 dpa at 250 and 300 °C with 10 He appm/dpa
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DOI：
10.1016/j.jnucmat.2004.04.300
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发表时间：
2004-08
影响因子：
3.1
通讯作者：
Gang-jin Yu;Xiaoqiang Li;Jinnan Yu;Yican Wu;H. Kinoshita;H. Takahashi;M. Victoria
中科院分区：
文献类型：
--
作者：
Gang-jin Yu;Xiaoqiang Li;Jinnan Yu;Yican Wu;H. Kinoshita;H. Takahashi;M. Victoria
降低活化马氏体钢试样在250°C和300°C下以10 He appm/dpa辐照0.1 ~ 50 dpa。原位显微组织观察表明，在250°C 1.7 dpa和300°C 0.1 dpa辐照下均有气泡出现。气泡尺寸分布为麦克斯韦分布，随着损伤剂量的增加，气泡尺寸分布演变为双峰分布。在300°C照射10 dpa和250°C照射30 dpa后发生转变。在250℃下，不同剂量的气泡浓度和峰值气泡尺寸相似，分别为3.8×1021m−3和2.5 nm。双峰分布第二峰的空腔尺寸约为6 nm。随着损伤剂量的增加，空腔尺寸分布逐渐增大，呈扩散分布。位错环是典型的间隙位错环，由黑白斑点演变为可见的间隙环。间隙环的尺寸范围在2.5 ~ 11 nm之间，位错环密度随损伤剂量的增加而单调增加。
Reduced activation martensitic steel specimens were irradiated by dual-beam from 0.1 to 50 dpa at 250 and 300 °C with 10 He appm/dpa. The in-situ microstructure observation shows that the bubbles were present after 1.7 dpa for 250 °C irradiation and after 0.1 dpa for 300 °C irradiation. The bubble size distribution is a Maxwell distribution, which evolves to a bimodal distribution with increasing damage dose. The transition occurs after 10 dpa at 300 °C irradiation and after 30 dpa at 250 °C irradiation. The bubble concentration and peak bubble size are similar for various doses at 250 °C, and are 3.8×1021m−3and 2.5 nm, respectively. The size of cavities at the second peak of the bimodal distribution is around 6 nm. The cavity size distribution increases and spreads out with damage dose increase. The dislocation loops are typical interstitial dislocation loops that evolve from black–white spots to visible interstitial loops. The size range of interstitial loops is between 2.5 and 11 nm and the dislocation loop density increases monotonically with the damage dose.