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Temperature Dependence of Radiation Damage in ODS Steel Studied by Triple Beam Irradiation and Positron Annihilation Techniques

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Abstract:

The oxide dispersed strengthened (ODS) ferritic-martensitic steel was irradiated by 100MeV iron ion whose energy was degraded by using a Ta foil of 4 μm thick, 100 keV Hydrogen and 200 keV Helium at 480, 515, 550 and 580 °C. The irradiation fluences were 1×1016, 1.1×1015 and 6.8×1013/cm2, respectively for Fe, H and He. The techniques of positron annihilation lifetime and Doppler broadening of slow positron beam were utilized to examine the produced radiation damage. At 550 °C the maximal positron annihilation lifetime and S parameter of Doppler broadening were observed, implyin g tha t 550 °C is the pea k temperature of swelling. The S parameter and annihilation lifetime of the sample irradiated at 515 °C by the single Fe ion beam were smaller compared to the triple beam irradiation at the same temperature, implying that the triple beam irradiation caused more severe damage than the single beam irradiation.

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Periodical:

Defect and Diffusion Forum (Volume 373)

Pages:

91-95

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.373.91

Citation:

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Online since:

March 2017

Authors:

Da Qing Yuan*, Qiao Li Zhang, Ping Fan, Xian Ping Wang, Bin Long, Hai Liang Ma, Yi Zuo, Ali Wen, Yong Nan Zheng, Xiang Shan Kong, Zhong Zhuang, Wei Feng, Jun Chen Liang, Wen Jun Xiong, Er Yang Lu, Xing Zhong Cao, Peng Zhang, Bao Yi Wang, Long Wei, Sheng Yun Zhu

Keywords:

ODS, Positron Annihilation, Radiation Damage, Triple Beam Irradiation

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* - Corresponding Author

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