Synergistic Effect on Formation of Radiation Damage in CLAM Steel Studied by Triple Beam Irradiation

Abstract:

The synergistic effect associated with displacement damage, hydrogen and heliumin the China Low Activation Martensitic (CLAM) steel has been investigated using the triple ion beamirradiation. Triple ion beams, an iron beam of 109 MeV degraded by a tantalum foil of 7.45 μm thick, the100 keV hydrogen and 200 keV helium, were injected into the CLAM steel samples simultaneously or sequentially.The radiation damage examinations were carried out by the slow positron Doppler broadening technique. Themeasured S parameters indicate that the radiation damage is different for different irradiationprocedures with same dpa and concentrations of H and He. The sample suffers most severe damage in the simultaneoustriple beam irradiation. The present experimental results support the molecular dynamics simulation result that the H facilitates the He-bubble nucleation and growth.

• Periodical: Defect and Diffusion Forum (Volume 373)
• Pages: 117-121
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.373.117
• Online since: March 2017
• Authors: Da Qing Yuan, Hai Liang Ma, Ping Fan, Yong Nan Zheng, Yi Zuo, Qiao Li Zhang, Ali Wen, Wei Feng, Jun Chen Liang, Wen Jun Xiong, Xiao Qiang Ma, Bao Qun Cui, Li Hua Chen, Wei Sheng Jiang, Qun Ying Huang, Yi Can Wu, Peng Lei, Xing Zhong Cao, Bao Yi Wang, Long Wei, Hai Hong Xia, Sheng Yun Zhu*
• Keywords: CLAM Steel, Slow Positron Doppler Broadening, Synergistic Effect, Triple Beam Irradiation

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