Synergistic effects on dislocation loops in reduced-activation martensitic steel investigated by single and sequential hydrogen/helium ion irradiation

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• 作者：Weiping Zhang^a ; Fengfeng Luo^a ; ^b ; Yanxia Yu^a ; Zhongcheng Zheng^a ; Zhenyu Shen^a ; Liping Guo^a ; ^{guolp@whu.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Yaoyao Ren^c ; Jinping Suo^d
• 关键词：Dislocation loops ; H/He synergistic effect ; Reduced-activation martensitic steel
• 刊名：Journal of Nuclear Materials
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：479
• 期：Complete
• 页码：302-306
• 全文大小：1490 K

文摘

Single-beam and sequential-beam irradiations were performed to investigate the H/He synergistic effect on dislocation loops in reduced-activation ferritic/martensitic (RAFM) steels. The irradiations were carried out with 10 keV H⁺, 18 keV He⁺ and 160 keV Ar⁺, alone and in combination at 723 K. He⁺ single-beam irradiation induced much larger dislocation loops than that induced by both H⁺ and Ar⁺ single-beam irradiation. H⁺ post-irradiation after He⁺ irradiation further increased the size of dislocation loops, whilst He⁺ post-irradiation or Ar⁺ post-irradiation following H⁺ irradiation only slightly increased the size of dislocation loops. The experiment results indicate that pre-implanted H⁺ can drastically inhibit the growth while post-implanted H⁺ can significantly enhance the growth of dislocation loops induced by He⁺ irradiation. The mechanisms behind the complex synergistic phenomena between H and He and the different roles that H and He played in the growth of dislocation loops are discussed.